NOISY · ONE TO ONE
Give the case mic to the speaker.
Speaker to case mic: within 40 cm / 16 in.
Select Noisy.INTERACTIVE USER GUIDE · ACUEAR PEBBLE 2 / PHA-126M-2
Hear conversations more clearly.
Wear the open-ear earphones.
The case becomes your remote microphone.
FIRST-TIME SETUP
Activate the earphones.
Do these four steps once.
First, remove both protective films.They cover the charging contacts.
Leaving them on prevents activation.
Leaving them on prevents activation.
- Remove both protective films.Check the metal contacts.
- Put both earphones in the case.Seat each one fully.
- Close the lid.Wait 5 seconds.
- Open the lid. Remove both earphones.They connect to the case mic automatically.
CHOOSE A MODE
What do you want to hear?
Hear the case microphone
- Start Hearing Assist. First use: After activation, the earphones are already connected to the case mic. Later use: Open the case and remove both earphones. They connect automatically.
-
Wear the earphones and check the sound.
Wear at least one earphone.
How to wear: Watch video
Success: You hear the sound picked up by the case.
No sound?
Next: choose Normal or Noisy →
Case light steady: Volume may be too low. Wear either earphone and press + once.
Case light flashing: Put both back in the case, close the lid for 5 seconds, then reopen it and remove them. - Slide the case switch to Normal or Noisy.The switch is on the front of the case.
Environment: slide the switch toward Normal or Noisy. DRIVE-THRU · ONE TO ONE
Point the case mic at the worker.
Hold it near the open window.
Select Noisy.MEETING · SEVERAL SPEAKERS
Place the case mic near the speakers.
Speaker to case mic: within 1.5 m / 5 ft.
Earphone user to stage: within 20 m / 66 ft. - Keep the case and earphones within 15 m / 50 ft.At 20 m / 66 ft—or through walls—sound may cut out.CASE MICEARPHONES
Green = stable range · Orange = sound may cut out
Success: Speech near the case sounds clear.
Next: adjust the volume →Connect to a phone, tablet, or TV
- Turn off the case mic.Hold its power button for 6 seconds.
A red light appears briefly. - Look for red and blue flashes.The earphones are ready to pair.
- Open Bluetooth settings.Select “AcuEar Pebble 2”.
Return to Hearing Assist: Put both earphones in the case.
Close the lid, then reopen it.
HOW TO WEAR
Follow the curve of your ear.
Put on the ear hook along the contour of your ear.
ADJUST VOLUME
Change it one level at a time.
Wear either earphone so you can hear each change. Press + or − on either side.
- Wear either earphone so you can hear the change.Only one side needs to be worn.
- Press + or − once on either side.The volume changes on both earphones. Do not hold the button.
- Repeat slowly, one press at a time.Wait for the level to change before pressing again. Choose from 16 levels.
Success: Each press changes both earphones by one level.
Hear a tone? You reached minimum or maximum volume.
CHARGING
Charge the case and earphones.
Use a USB-C power source rated 5 V, 1–2.4 A.
Charge the setSee the correct charging position.
- Charging: earphone LEDs stay solid red.
- Fully charged: the LEDs turn off after about 2.5 hours.
- Case mic: up to 10 hours.
- Earphones:
- Hearing Assist: up to 10 hours with the case mic.
- Bluetooth: up to 18 hours.
FIX A PROBLEM
What is happening?
Open the symptom that matches what you see or hear.
No sound from the case mic
Do this:
- Remove both protective films.
- Put both earphones in the case.
- Close the lid for 5 seconds.
- Open it. Remove both earphones.
Expected: You hear sound from the case.
If not, open the reset steps below.
Sound cuts out
Do this:
- Stay within 15 m / 50 ft.
- Move away from walls, metal, and interference.
- Move the case closer to the speaker.
Expected: Steady speech without dropouts.
Bluetooth cannot find the earphones
- Hold the case power button for 6 seconds.
- Wait for red and blue flashes.
- Turn off Bluetooth on previously connected devices.
- Scan again.
Expected: “AcuEar Pebble 2” appears in the device list.
Volume does not change
- Wear at least one earphone.
- Press + or − once on either side. Do not hold.
- The volume applies to both earphones.
- Repeat separate presses and listen for the end tone.
Reset the case mic and earphones
- Open the case. Hold the case power button for 3 seconds until its LED flashes red and blue.
- Double-press the case power button. Solid pink for 2 seconds means reset complete.
- Remove both earphones. While their LEDs flash red and blue, hold + and − together on either earphone for 5 seconds. Both show solid pink for 2 seconds.
- Return both earphones to the case and close the lid. Open it again to reconnect automatically.
This clears saved Bluetooth pairing information.
REFERENCE
Buttons, modes, charging.
Case microphone
- Power
- Hold 6 sec: on/off
- Reset
- Hold 3 sec, then double-press
- Environment
- Normal / Noisy
- Mic pickup
- Omnidirectional
Earphones
- + / −
- Single-press: volume
- + and −
- Hold 5 sec: reset
- Volume
- 16 levels; end tones
- Mono use
- Either side works alone
Power & range
- Charging
- About 2.5 hours
- Hearing mode
- About 10 hours
- Bluetooth mode
- About 18 hours
- Stable target
- About 15 m / 50 ft or closer
STILL NEED HELP?
Get the right help for AcuEar Pebble 2.
Select AcuEar Pebble 2 / PHA-126M-2. Include the mode, LED pattern, distance, and what happened after closing and reopening the case.
RECOMMENDED
Submit an AcuEar Pebble 2 support ticket
Add photos or screenshots if needed. The form routes your question to the product team.
Start support request →