HT381 Overview - Buttons, Indicators & Function Table
1. Transmitter Dock Overview & Function Table
① Charging cradle ⑦ Mode indicator
② Spare charging slot ⑧ DC in
③ Power/signal indicator ⑨ Mono/stereo switch
④ Neck-Loop receiver charging indicator ⑩ Optical input
⑤ Spare battery charging indicator ⑪ Aux 3.5mm input
⑥ Mode button
Transmitter Function Table
| Function | From Status | Action | Indicator |
| Power on | OFF | Connect to Power | Power/signal indicator③ flash Green rapidly |
| Power off | ON | Unplug from Power | / |
| Valid Audio Signal | Connected | Remove the headphones from the dock | Power/signal indicator③ stays solid Green |
| Adjust EQ | Connected | Click"Mode" button⑥ once | Bass mode- BASS⑦ solid Orange |
| Treble mode- TREBLE⑦ solid Orange |
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| Balanced mode- BALANCED⑦ solid Orange |
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| Switch Stereo/Mono | Connected | Switch "Stereo/Mono" button⑨ | / |
| Charging headphone/Battery | Dock plugged into power source | Put the headphone/battery on Transmitter dock |
Neck-Loop receiver charging indicator④/Spare batery charging indiator⑤ staying on Red & Power/signal indicator③ turns OFF |
2. Headphone Overview & Function Table
⑫ ON/OFF ⑯ Microphone
⑬ Ambient button ⑰ Left-right audio balance control
⑭ Power/signal indicator ⑱ Battery
⑮ Volume control
Headphone Function Table
| Function | From Status | Action | LED Indicator⑭ |
| Power on | OFF | Slide the Power Switch⑫ to ON | Flashing Green once every 1s |
| Pairing | ON | Press and hold Ambient button⑬ 5s | Flashing Green rapidly |
| Adjust Volume | Connected | Rolling Volume Control⑮ | / |
| Adjust sound balance | Connected | Rolling Left-right audio balance control⑰ | / |
| Turn on/off Ambient | Connected | Click Ambient button⑬ Once | Ambient turned on- Solid Red |
| Ambient turned off- Solid Green | |||
| Power off | ON | Slide the Power Switch ⑫ to OFF | / |
3. LED Indicator Table
| LED Indicator | Status | Means |
| Transmitter Power/signal indicator③ | Flashing Green once every 1s | Reconnecting/Connected without Audio |
| Solid Green | Headphone connected with Audio | |
| Transmitter charging indicator④ | Solid Red | Charging Headphone |
| Solid Green | Charging Completed | |
| Transmitter charging indicator⑤ | Solid Red | Charging Battery |
| Solid Green | Charging Completed | |
| Transmitter Mode indicator⑦ | Bass solid Orange | Bass Mode |
| Treble solid Orange | Treble Mode | |
| Balanced solid Orange | Balanced Mode | |
| Headphone Power/signal indicator⑭ | Flashing Green once every 1s | Reconnecting |
| Flashing Green quickly | Pairing | |
| Solid Green | Connected with Transmitter Dock | |
| Solid Red | Ambient turned on | |
| Flashes Green once every 2s | Low battery |
