HT4189B – Power and Charging Guide
Learn how to power your transmitter, charge your headphones, and check the charging lights.
Before You Start
The transmitter has no built-in battery and must stay connected to USB power. The headphones have a rechargeable battery.
Step 1 – Power the Transmitter
- Connect the provided USB power cable to the transmitter.
- Plug the other end into a USB power source.
- Use a power source rated 5V / 0.5–2A.
Need a Wall Adapter?
If you do not have a suitable USB wall adapter, contact Avantree Support to request a free one.
Request a Wall Adapter →Step 2 – Charge the Headphones
- Connect the provided USB-C charging cable to the headphones.
- Connect the other end to a USB power source.
- Allow approximately 3 hours for a full charge.
Check the Headphone LED
Solid RED = Charging
LED OFF = Fully charged
Headphone Battery Information
Charging time: Approximately 3 hours
Battery life: Up to 20 hours
Battery: Built-in rechargeable lithium-polymer battery
Battery life is estimated at 60% volume. Actual listening time may vary.
Transmitter Not Turning On?
- Make sure the USB power cable is firmly connected.
- Try a 5V USB wall adapter instead of the TV's USB port.
- Try another compatible USB power cable or power source.
Headphones Not Charging?
- Check that the USB-C cable is fully inserted into the headphones.
- Try another USB power source.
- Try another compatible USB-C charging cable.
- Leave the headphones charging for approximately 3 hours, then check whether they turn on.
Note: The charging LED normally turns OFF when the battery is fully charged.
Something Doesn't Look Right?
If your transmitter will not turn on or your headphones will not charge, contact Avantree Support. Tell us which device is having the problem.
Contact Avantree Support →
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