How to Factory Reset / Clear Pairing History of the HT4189

The transmitter and the headphones in HT4189 set are pre-paired and LOCKED with each other. The factory reset function will clear the pairing history with other devices, but the original set still remains paired and locked. If you used them separately with another device, and later found that HT4189 will not auto-reconnect with each other, you may need to do the reset.

The HT4189 set consists of 2 parts: The Audikast Plus Trasmitter, and the AS9S Headphones. Each needs to be resetted separately.

Factory Reset the Audikast Plus Transmitter

Power ON. Press & hold the "+" and "-" buttons simultaneously for 7 seconds. You'll see both Bluetooth LED indicators light up PINK and turn off, indicating that the reset was successful. (Note: If your transmitter doesn't have "+""-" volume buttons, then press and hold the "1"/ "A" and "2"/ "B" buttons instead.)

Once this is done, the Audikast Plus will re-enter pairing mode, as indicated by the Bluetooth icon next to "1"/ "A" flashing RED & BLUE.

Turn the transmitter OFF.

Factory Reset the AS9S Headphones

After turning on, press and hold both “+” and “-” for 10 seconds until the red and blue LEDs are BOTH on for 2 seconds (looks PINK) - now all the paired history of the headphones is cleared. It then enters pairing mode automatically with the LED flashing alternately red and blue. 

Turn the headphone OFF.

Then turn both the transmitter and the headphone on. Wait for 5-10 sec, the transmitter and headphones will auto-reconnect.  You will see SOLID blue light both on transmitter and headphone and hear "Connected" from headphones. 

In case they fail to reconnect, you might need manually Re-pair, Connect, and Lock the headphone and transmitter base