Video Guide
Prefer to watch a video tutorial? Visit avantree.com/381/video for a step-by-step guide.
You can also book a 1-on-1 setup appointment with one of our support agents at avantree.com/book-a-call.
Box Contents
- A: Wireless Transmitter & Charging Dock
- B: Wireless Earbuds
- C: Wall Adapter
- D: Polymer Lithium Rechargeable Battery X 2
- E: Earbuds tips (M / S)
- F: Optical Audio Cable
- G: 3.5mm AUX Cable
- H: 3.5mm AUX to RCA Adapter
- I: 6.35mm to 3.5mm Adapter
Product Introduction (Earbuds)
Product Overview
1. ON/OFF Switch: Slide to the "ON / OFF" position to turn the earbuds on or off.
2. Volume Control: Roll to "+ / -" to increase or decrease volume.
3. AMBIENT Button: Click once to enter AMBIENT mode to amplify surrounding sound. Hold for 5 seconds to enter pairing mode.
4. Left-Right Audio Balance Control: Turn to "L / R" to boost the audio on the left or right side.
A. Power / Connection / Mode Indicator: Indicates power status, connection status, and mode.
Microphone: Built-in microphone.
Battery: Compartment for the rechargeable battery.
Button Functions
| No. | Button | Functions |
|---|---|---|
| 1 | [ON/OFF Switch] | Switch to the "ON / OFF" position to turn the earbuds on / off. |
| 2 | [Volume Control] | Roll to "+ / -" to enter increase / decrease volume. |
| 3 | [AMBIENT Button] | Click once to enter AMBIENT mode to amplify surrounding sound. Hold for 5 seconds to get the earbuds into pairing mode. |
| 4 | [L/R Balance] | Turn to "L / R" to boost the audio on the left or right side depending on your needs. |
LED Indicators
| No. | Indicators & Voice Prompt | Status |
|---|---|---|
| A | Green flashes every second | Power on |
| LED off | Power off | |
| Green flashes twice every second | Pairing | |
| Solid green | Connected | |
| Green flashes every 5 seconds | Disconnected | |
| Solid red | AMBIENT mode on |
Product Introduction (Transmitter & Charging Dock)
Product Overview
Spare battery charging slot: For charging an additional battery.
Charging cradle: Where the earbuds dock for charging.
1. Mode Button: Controls audio modes.
2. Stereo / Mono Switch: Selects stereo or mono audio output.
A. Spare battery charging indicator: Shows the status of the spare battery charging.
B. Earbuds charging indicator: Shows the status of the earbuds charging.
C. Power / Connection Indicator: Shows the power and connection status of the transmitter.
D. Bass / Treble / Balanced Mode Indicator: Indicates the selected audio EQ mode.
Power port: Connect the power adapter here.
Button Functions
| No. | Button | Functions |
|---|---|---|
| 1 | [MODE Button] | Click once to switch between BASS / TREBLE / BALANCED mode. |
| 2 | [Stereo/Mono Switch] | Switch between "Stereo / Mono". |
LED Indicators
| No. | Indicators | Status |
|---|---|---|
| A | Solid red | Spare battery charging |
| Solid green | Spare battery fully charged | |
| B | Solid red | Earbuds charging |
| Solid green | Earbuds fully charged | |
| C | Flashing green rapidly | Power on |
| Solid Green | Earbuds and transmitter connected | |
| Turned off | Earbuds charging | |
| D | Solid orange | Bass / Treble / Balanced EQ Mode |
Setting Up
Connecting to Your TV
The transmitter dock must be connected to a power source using the provided charger to function. Once connected to power, you can connect it to your TV using one of three methods:
Option 1: Optical port (recommended)
Plug the provided optical audio cable into the TV's optical OUT or "OPT OUT" port, then plug the other end into the transmitter's optical port in the "INPUT FROM TV" section.
NOTE: Most TVs support audio output through only one digital output port at a time. If your TV's HDMI ARC port is in use, the optical port may be disabled. You can either disconnect the HDMI ARC device or try connecting the transmitter via RCA / AUX.
Option 2: AUX 3.5mm port
Plug the provided AUX 3.5mm audio cable into the TV's AUX 3.5mm output port, then plug the other end into the transmitter's AUX 3.5mm port in the "INPUT FROM TV" section.
Option 3: RCA port
Attach the provided RCA adapter to the AUX 3.5mm audio cable. Plug the red & white RCA connectors into the TV's "AUDIO OUT" ports, then plug the other end into the transmitter's AUX 3.5mm port in the "INPUT FROM TV" section.
Connecting the Earbuds to the Transmitter
Now that the transmitter is set up, connect the HT381 earbuds to the transmitter.
STEP 1
Remove the HT381 earbuds from the transmitter dock. Power on the earbuds by sliding the [ON/OFF Switch] to the "ON" position. The LED indicator will flash green every second.
STEP 2
Wait a few seconds; the HT381 earbuds will connect to the transmitter automatically. Once connected, both the LED indicator on the earbuds and the LED indicator on the transmitter will turn solid green.
Setting Up Your TV (FOR OPTICAL CONNECTIONS ONLY)
If you connected to your TV via the optical OUT or "OPT OUT" port, you will need to configure your TV settings to receive audio.
STEP 1
Using your TV's remote control, press the SETTINGS button and navigate to the AUDIO tab within the settings menu. (Note: Settings names may vary by TV brand).
STEP 2
Proceed to AUDIO OUTPUT and select "OPTICAL OUT / DIGITAL OUT". Many TVs do this automatically; skip this step if necessary.
STEP 3
Set the AUDIO OUTPUT format to "PCM / STEREO" ON or "DOLBY" OFF.
If you are having trouble finding these settings, scan the QR code for your TV's brand below or visit avantree.com/381/tv-audio-settings for a more detailed guide.
NOTE 1: Smart TVs may reset their settings after system updates. If you are not getting sound, ensure your audio output/input format is set to "PCM" and NOT "AUTO" or "Dolby."
NOTE 2: When using Netflix or Amazon Prime, you may need to start the movie/show first before changing the audio settings to "PCM."
Advanced Features
Listening with an AV Receiver
The HT381 includes one 6.35mm to 3.5mm audio adapter and one AUX 3.5mm audio cable for use with your AV Receiver.
STEP 1
Plug a 3.5mm AUX audio cable into the transmitter's AUX 3.5mm port in the "INPUT FROM TV" section.
STEP 2
Attach the 6.35mm to 3.5mm audio adapter, then plug it into the "Phones" jack at the front of your AV Receiver. You are now ready to go.
Adding two or more HT381 earbuds
The HT381 transmitter can connect up to 100 pairs of earbuds. Follow these steps to connect two or more HT381 earbuds to the transmitter:
STEP 1
Connect the earbuds to the transmitter by following the steps in the "Connecting the Earbuds to the Transmitter" section (Page 11).
STEP 2
Turn on the second pair of HT381 earbuds, then press and hold the "AMBIENT" button on the earbuds for 5 seconds until the LED indicator starts flashing green rapidly.
STEP 3
Press and hold the "MODE" button on the transmitter for 5 seconds until the LED indicator starts flashing green rapidly.
STEP 4
Keep the second pair of HT381 earbuds and the transmitter close to each other and wait for them to pair. Once connected, both the earbuds indicator and the transmitter indicator will turn solid green to indicate that the connection has been established.
Charging the Earbuds
When the earbuds' battery is low, you will hear "beeps" three times per minute and the LED will flash green twice every second. Please charge the headphones when this happens. There are two ways to charge the earbuds:
OPTION 1: Charging via the transmitter
While the transmitter is connected to power, place the earbuds back into the transmitter. The [Earbuds Charging Indicator] will turn red while charging. Once fully charged, it will turn green.
OPTION 2: Swapping in the spare battery.
The HT381 set comes with an extra battery. Simply swap in the extra battery, and insert the drained battery into the battery charging dock to charge. The [Spare Battery Charging Indicator] on the front side of the transmitter dock will turn red when the battery is charging and turn green when the charging is complete.
Specifications
Transmitter
| Feature | Specification |
|---|---|
| Carrier Frequency | 2.4GHz |
| Operating range | Up to 100ft / 30m |
| Operating Voltage | 5V |
| Supported audio format in optical mode | PCM / LPCM |
| Power port | Type C |
| Rated input | DC5V / 500mA~2.0A |
| Weight | 157g |
Earbuds
| Feature | Specification |
|---|---|
| Carrier Frequency | 2.4GHz |
| Operating range | Up to 30ft / 10m |
| Operating Voltage | 3.7V Lithium Polymer Battery |
| Play time | Up to 8 hrs |
| Charging time | ~2hrs |
| Weight | 72g |
FAQ
Can I have audio through my TV's speakers and wireless earbuds at the same time?
This depends on whether your TV supports outputting audio to two sources simultaneously. You can try a few methods to test this. Please refer to avantree.com/381/sound for more details.
My earbuds have no sound when connected to the transmitter – what do I do?
Check that your earbuds are successfully connected to the Transmitter. Once connected, the LED indicator on the earbuds and the TRANSMIT LED indicator on the transmitter should turn solid green. If you are still not receiving sound, check that the proper audio signal is being sent to the transmitter.
If using an RCA / AUX connection, set your TV's audio output settings to "Headphone" or "External Speakers." If using an OPT connection, turn "PCM / STEREO" ON or "DOLBY" OFF.
For RCA / AUX connections, you can also connect the TV's output port directly to a pair of headphones to test for audio. If there is no sound, the TV's port may be defective.
Please refer to avantree.com/381/no-sound for more details.
How to adjust volume on the earbuds of HT381?
Why aren't I getting sound when watching Netflix / Amazon Prime?
For answers to these and other questions, visit the full FAQ list at avantree.com/support/381, or contact Avantree directly for additional assistance.
Contact Us
Support Tickets: avantree.com/submit-a-ticket
Support Email: support@avantree.com
- USA / CA: +1800 232 2078 (9am-6pm PST, Mon-Fri)
- UK: +44 20 8068 2023 (9am-6pm, GMT, Mon-Sat)
- DE: +49 32221097297 (11am-9pm, CET, Mon-Sat)
- FR: +33 176340312 (11am-9pm, CET, Mon-Sat)
- IT: +39 06 9480 3330 (9am-6pm, CET, Mon-Sat)
- ES: +34 931786261 (9am-6pm, CET, Mon-Sat)
- AU: +61 2 8310 9897 (11am-7pm, AEST, Mon-Fri)
Video Guide: avantree.com/381/video
Manufacturer & Importer Information
Manufacturer: Avantronics Limited, Luohu District, Shenzhen 518000 China. Phone: +86 755 8228 5022. Email: support@avantronics.com
US Importer: Avantree Corporation, San Jose, California 95119 USA. Phone: +1 800 232 2078. Email: support@avantree.com
UK Importer: Avantree Limited, Watford, WD180 0HQ UK. Phone: +44 20 8068 2023. Email: support-uk@avantree.com
Battery Manufacture: DONGGUAN HUAYU BATTERY CO.,Ltd, No.555, Mejing Mid Road, Dalang Town, Dongguan City, Guangdong Province, China. Phone: +86 13902694406. Email: xiongxuehua@huayudy.com
[EC REP]
Importer and Responsible Person: Avantree Europe Z O.O., Ul. żołnierzy I Dywizji Wojska Polskiego 78A/2 84-230 Rumia Pomorskie, Poland. Phone: +48 22 307 25 37. Email: support-eu@avantree.com
[CE mark]
Model No: WSHT-381
Dispose of the packaging and this product in accordance with the latest provisions.
Document Version: Z-PKQG-HT381-V6
