CK121 Product Support

Bluetooth TV and non-Bluetooth TV are paired differently, please refer to the following for more details.

The CK121 allows you to play music through your car stereo via Bluetooth even if your car does not have a built in Bluetooth function. You can also use the CK121 with other speakers that do not support Bluetooth and have an AUX port.

Setting Up:

Using the metallic dongle, plug one end into the port on the side of the CK121 and the other end into the AUX port of your car stereo or speaker. 

Alternatively, you can also use the AUX cable.

Now you can pair the CK121 with your devices and start streaming music!

Step 1: Pair the First Device.

Step 2: Turn the CK121 off.

Press and hold the MFB for about 3 seconds until the LED turns RED and powers off.

Step 3: Put the CK121 into pairing mode again.

Press and hold the MFB until the LED flashes RED and BLUE again. 

Step 4: Connect the Second Device. 

Find "Avantree CK121" on the second device and connect to it.

Step 5: Turn on Bluetooth on the first device and connect.

On your first device, turn Bluetooth back on and tap on "Avantree CK121" to pair with the CK121. Now both phones should be simultaneously connected to the CK121.

If you can see the LED rapidly flashing RED, you will need to charge the CK121. After flashing RED for a while, it will automatically power off.

Instructions:

Insert the micro USB (smaller) end into the charging port on the CK121 and the USB end into a power source. You can either use the included charging cord or any USB to micro USB cable to charge.

Indicators:

The LED will be RED while it is charging and turn off when charging is complete. You are still able to use the CK121 while it is charging.

Conducting a factory reset on the CK121 will clear all past pairing data and restore the default settings for the product. You may want to reset your CK121 if you have trouble pairing them with your devices.

Step 1: Turn the CK121 off.

If the CK121 is on, press and hold the MFB for about 3 seconds until it turns off. The LED should turn RED then shut off. 

Step 2: Reset the CK121.

Press and hold the MFB until the CK121 turns on, goes into pairing mode, and finally turns back off. DO NOT RELEASE THE MFB UNTIL THE CK121 POWERS OFF. Upon powering back on, the CK121 will enter pairing mode and the LED will alternate between flashing RED and BLUE. You are now free to pair the CK121 with your devices!

Check Point 1: Have you Connected/Paired it Properly?
Check on your device Bluetooth device list, it should say "Connected" on the menu. If not, please try to pair it to your device again.

Check Point 2: Have you been Switching between APPs?
Sometimes when you're listening to music and a call comes in, the Headphones/Speaker can have issues switching back-n-forth... this is a common Bluetooth issue and happens to every Bluetooth Headphone/Speaker. 
Please choose the headphone/speaker again (if applicable) or reboot the headphone/speaker and pair them up again.

Check Point 3: Have you Charged the Headphone/Speaker?
This might seem like a simple solution but when the device is low on battery, a wide variety of issues may occur. Please make sure that it has sufficient battery level.

If you've checked everything above but still no sound, please try the methods below.

Method 1: Try it on a Different Device.
If you have another phone, another laptop etc... try to connect the Headphone/Speaker to it and see if it works on the other device. 
If yes, it's probably something to do with the settings on your original device, please try again.
If no, please contact us for support, you may have a faulty unit.

Method 2 (For Laptops/Computers): Check the Audio Settings.
For Windows, go into Sound Settings and Sound Control Panel. For Mac, go into Sound Preferences.
Make sure that the Headphone/Speaker you'd like to use has been selected as the Audio Output/Input device.
If you're using a Meeting Software such as Skype or Zoom, you may need to go into the app itself and adjust the settings in there as well.

Method 3: Factory Reset.
If none of the methods above work, please factory reset the Headphone/Speaker and pair again. Please remember to delete the Avantree device from the paired Bluetooth device list on our sound source device, before attempting to pair again.

If factory reset still can't get it to work or if you have any more questions or need further assistance, feel free to contact us at support@avantree.com

If you are still having difficulty pairing the Avantree Headphone/Speaker/Receiver to your devices, please refer to the methods below to troubleshoot.

Check Point: Did you Get the Headphone/Speaker/Receiver into Pairing Mode?

Powering on does NOT mean pairing mode. Pairing Mode for Avantree = The LED indicator on the Headphone/Speaker/Receiver flashing RED & BLUE. If it's not doing that, it's not in pairing mode, you won't find it on your device.

Other than the indicator, if you're using a Headphone/Speaker that has voice prompt (i.e. it says "welcome to Avantree" when you power it on,) it'll say "Pairing" when it's in pairing mode.

If it's flashing RED & BLUE yet you can't connect it, please refer to the steps below.

Step 1: Reboot it and try again.

Yes, the good o' soft reset often resolves the issue. Please give it a go. Please also try rebooting your Phone/Computer.
If you still can't get them to connect, please proceed to step 2.

Step 2: Try it Somewhere Else.

Bluetooth connection can often be interfered with by other wireless connections such as WiFi Router, TV streaming device, or even another Bluetooth device. Please either move them away or try to do the pairing somewhere else.

If you are still unable to pair, continue to Step 3.

Step 3: Factory Reset.

Factory reset the Avantree Headphones/Speaker/Receiver may help. If you're not sure how to do the reset, please follow the below steps to find the instructions:

1.Go to Avantree.com

2.Enter "Product Name/Model Number+reset" and search. Click "Support " and you will find the guide of how to factory reset your device.

After resetting, the device should automatically reenter pairing mode.

If you have any more questions or need further assistance, feel free to contact us at support@avantree.com

This Troubleshooting is for Connecting a Bluetooth device DIRECTLY to your Windows Computer's Built-in Bluetooth.
The Built-in Bluetooth of some old PCs might not work, or not work well, thus, you may not be able to use the direct Bluetooth connection, or have unstable connection, hear choppy sound cutting out intermittently, etc., in this case, please try the following solutions: 

Solution 1.  Reboot your Bluetooth Driver
  1) Right-click the Start button, select Device Manager.
  2) Find “Bluetooth” section,  then Right-click on your device Bluetooth driver and select  “Disable device”.
  3) Restart your PC and repeat the above steps to Enable the Bluetooth driver again   (select  “Enable device”)
  4) Pair your Bluetooth Headphone/Speaker/Receiver with the PC again.


Solution 2. Use an External Bluetooth Driver
This method essentially "Bypasses" your Windows' built-in Bluetooth. Please see our Avantree DG10, DG40S , DG45 or Avantree DG80 for more details or contact us at support@avantree.com.

Many Avantree products have incorporated the latest "aptx low latency" codec technology, for superior stereo quality sound without any noticeable delay (known as latency).

• What is aptX Low Latency - https://www.aptx.com/aptx-low-latency
• Certified aptX Low Latency device list - https://www.aptx.com/products?field_aptx_type_tid=484

* Important note*

To take advantage of the better performance of aptX Low Latency codec, the other side Bluetooth device must support the same codec. If the other side device only supports the normal aptX codec, or the SBC one, these codecs will be used instead.       

How about the audio delay when use different wireless audio codec?

Note: The latency for FastStream is almost the same as aptX Low Latency, but the audio quality of aptX Low Latency is better.

Related FAQ >

• What Avantree products support aptX Low Latency and aptX HD?
• Bluetooth Audio Delay Experiment Video - aptX Low Latency vs others

Here are a few things you'd want to know about Bluetooth...

1. Bluetooth by nature is a short-range wireless technology.

Bluetooth was initially made specifically for wireless headsets hence its “range” was never meant to be anything more than the length of a typical backyard.

2. Bluetooth Signals are easily interfered with.

Much like almost any other modern wireless technology, Bluetooth signals can be negatively affected by things like walls, floors, other wireless devices, or even a human body.

If you want a better range & less interference, try to stay clear of the things mentioned above.

3. There are two types of Bluetooth.

In short, they are “Class 1” and “Class 2.”  Class 1 has better range (100m/300ft) but drains your battery faster, whereas Class 2 has a shorter range (10m/30ft) but is more efficient when it comes to battery usage.  

4. The “Actual Range” depends on a lot of things.

Things that can affect the range: Bluetooth version, Bluetooth type, Bluetooth profile, Brand & make, where you’re using it, what’s around you… etc and many more. Getting a bad range doesn’t necessarily mean your device is bad; try it elsewhere before you give it a conclusion.

5. The “Transmitter” and the “Receiver.”

Every Bluetooth connection consists of a “transmitter” and a “receiver.” The “transmitter” sends the signals to the “receiver.” In a typical Bluetooth headphone connection, your phone is the transmitter and the headphone is the receiver.

There are cases where one device can do both, but it is unlikely that they’ll be able to do both at the same time.

Here are some examples:

• Transmitters: Phone, Computer (can sometimes use as receiver), TV.
• Receiver: Headphones, Speaker

Avantree offers the following customer support to help you make the best of our products?

Online DIY Support

1. Visit Product Page - you can find product comparison info, accessories link, Support page link.
2. Product Support page - Guide, Troubleshooting, Q&A Session for each product. (FromAvantree.com > Use Top Right Magnify Class to Search your Product Name > Click Product > Click Support button on the right product > check relevant info on page)
3. Product Video Guide - Step by step (from youtube.com > search product name

Agent Support

1. Submit a Ticket OR File a Claim (1 working day reply)
2. Send an email to support@avantree.com (1 working day reply)
3. Book a call or Screensharing Online Clinic with us and let an agent help you in real-time.
4. Live Chat with Agent (Pacific Standard Time, Mon-Thur 9 am-11 pm, Fri, 9 am-5 pm)
5. Telephone Support (Local Number here)
6. Join our Daily Live Online Zoom Clinic to speed up the troubleshooting process (Time: 11 am - 12 pm PST/ 2-3 pm EST /7-8 pm GMT; 10-15 min for each clinic)

Avantree offers the following native language support?

English
Spanish
Italian
German
French
Chinese

See more details in Warranty Policy and RMA Policy

Avantree Products RMA (Return Merchandise Authorization) Procedure

1.     60-Days-Return-Refund

Item purchased from Avantree.com can be returned to the closest Avantree RMA center for full refund within 30 days of purchase with no question asked.

Customer will be responsible for return shipment cost unless item is returned due to defective issues.

Avantree RMA centers are located at:

-        USA - San Jose & Los Angeles

-        Canada – Vancouver

-        EU - London, UK

-        Australia – Roxburgh Park

-        Asia – Cebu, Philippines

-        Asia – Hong Kong, China

-        Asia – Shenzhen, China

2.     Defective RMA

Within the Warranty Period (24 Months), if the customer encounters any issue, we recommend following the steps below:

Step 1:  DIY Support – Visit support.avantree.com, we have a complete troubleshooting guide that should solve at least 90% of the issues.

Step 2: Agent Support – Contact Avantree Customer Service Agents by email (support@avantree.com), phone, or chat for troubleshooting & issue diagnosis.

Step 3: Replacement

3.1. Confirmed Defective Unit

-        Avantree provides RMA (CD) number to customer

-        Customer returns the product to Avantree

o   Purchased within 6 months – Avantree will cover the return label cost.

o   Purchased over 6 months ago – Customer will cover the return label cost.

-        Avantree arranges the Replacement

o   Will be arranged as soon as the return shipment has been shipped.

o   Customer can expect to receive the replacement unit within 5-7 working days.

3.2. Back-for-Investigation Unit

-        Avantree provides RMA (BI) number to customer

-        Customer returns the product to Avantree. Customer will cover the return label cost.

-        Avantree arranges the follow up

o   Confirmed Defective Units – Please Refer to Section 3.1.

o   No claimed issue found – Avantree will arrange the Original Unit or the Replacement Unit to be shipped back to the customer. Avantree will cover the cost of shipping if the shipment is domestic.

Note:

1. The RMA return unit will be equivalent to or better than the condition of the defective unit
2. The RMA return unit's warranty terms will only be activated once the defective unit is received. For those who do not return their defective items within 30 days, their product warranty will be terminated.
3. Replacement Unit Warranty Terms:
   • If the remaining Warranty of the Defective Unit is less than 3 months – The Replacement Unit will receive 3 months warranty beginning on the date of reception.
   • If the remaining Warranty of the Defective Unit is more than 3 months – The remaining Warranty Period will be automatically transferred onto the Replacement Unit.

Return Policy:

Every Avantree product purchased from our website comes with an up to 60 days free trial.

Within 60 days of buying, if you have an issue with or simply don't like the product, you can ship it back to us and we'll fully refund you for the price that you bought it. If you have a product malfunction, we can replace the product for you if that's preferable, and we'll cover the return shipping costs.

Warranty Policy:

Avantree warrants its products for a period of 24 months from any defects in manufacturing, materials, or workmanship from the date of purchase from either an Avantree Direct store or an Avantree authorized reseller and used in normal conditions.

However, this warranty does NOT cover:

· Damage from misuse or abuse,

· Damage from lack of reasonable care,

· Damage from force majeure,

· Damage from natural forces/disasters,

· Damage from inadequate repairs performed by unauthorized service centers,

· Water damage on non-water-resistant products,

· Theft or losing the item.

If you encounter issues during the warranty time, pls follow Avantree RMA Procedure. 

To make sure our customers have the best user experience, we choose to send the replacment first before you send back the faulty unit. Once the replacement is received and confirmed to be working, we will then send you the return label for the faulty unit for our quality control purposes. We expect you to cooperate and send the faulty unit back within 30 days. If not, then the warranty of your replacement unit will be voided.

Batch No. or Lot No. is a 4-5 Digit/Alphabet combination (e.g. T22F1, 22B1, or T22J1) printed somewhere on the product. The "somewhere" is usually as follows:

1. on the bottom of the product;

2. on the inside of the Headband, just above the Earcups;

3. on the in-line controls or on a Tag near the 3.5mm AUX Plug;

4. on metal head of the adapter;

Above are some examples that'll give you an idea of what the Batch/Lot Number looks like and where to find them. The print for Batch No. or Lot No. is usually quite small; please consider using a magnifying glass if it's hard to read.

Items with the "ADD TO CART" button are for purchase in your area. Those without the Add to Cart button means not available in your area, normally because it is out of stock. Besides, the estimated delivery time is not applied for pre-order and backorder items.

Here is a table of the recommended store info for customers from each country. We also include information about - where the goods will be shipped from as well as the estimated delivery time.

Remarks:

1. Warranty is 24M for orders from avantree.com
2. Items purchased from other authorized distributor channels will be entitled to 12m warranty, and extendable to 24m upon warranty registration within 30 days from date of purchase
3. Not all stores/sellers from the links above are authorized resellers.

As you may know, earbuds get dirty pretty easily... Earwax, dust, water etc. can all do damage to them. Uncleaned earbuds may lead to...

• Music sounding muddy or muffled
• Different volume on the two earbuds
• Abnormaly low volume / tinny sound after using for a period of time

Daily maintaince can effectively eliminate such problems.

• Before wearing the earbuds, make sure to clean the inner side of the ear.
• Always wear and use earbuds in dry condition.
• After using the earbuds, wipe the inside of the earbud tip with a soft and dry towel to remove dust, earwax, or oil from your skin.

If you're already experiencing different volume levels between the two earbuds, please try to follow the following steps to clean them out:

(These apply to all Avantree earbuds, but the following uses the NB18 as an example.)

1. Materials you'll need: a cotton swab and dried brush (if you can't find the black cleaning brush, a toothbrush can work instead.)

2. Take off the earbud tips from the earbuds smoothly. Do not detach the earbud tip from the earbud excessively as it may tear.

3. Use a cotton swab and dried brush to remove any debris and foreign materials.

4. If foreign substance is still present, try brushing the earbuds again to dislodge the remainder.

5. After you finish cleaning, please assemble the earbud tip back to the earbud properly. Cover the latch at the bottom of the earbud with the earbud tip like below.

Please note: Do not use liquid like alcohol or soapy water for cleaning earbuds as some of our earbuds are not alcohol-proof or soapy-waterproof.

If the problem still exists after cleaning the earbuds, please contact support@avantree.com for help.

If you have any questions about placing orders, shipping countries, tracking information, or others. Please check here for more information.