1. Product Overview
The Avantree HT4189 is a wireless headphone and transmitter set designed for TV watching, offering a no-delay audio experience. It supports various TV audio outputs and provides extended range and playtime.

Image: Avantree HT4189 Wireless Headphones and Transmitter.
2. Setup Guide
2.1. TV Compatibility
The Avantree HT4189 supports TVs with optical (TOSLINK), AUX (3.5mm), or built-in Bluetooth audio outputs. Please confirm your TV has one of these options before connecting.

Image: Diagram showing TV compatibility with optical, AUX, and built-in Bluetooth.
2.2. Hassle-Free Setup
No complex Bluetooth pairing is required with this wireless TV headphone set. Simply plug the HT4189’s transmitter into your TV’s audio output port, power everything on, and they will quickly connect automatically.

Image: Illustration of simple plug-and-play setup with the transmitter and headphones.
2.3. Connecting to Smart TVs
For Smart TVs with built-in Bluetooth (e.g., 2024 Samsung TVs), the HT4189 headphones can pair directly via Bluetooth. In this scenario, slide the transmitter to 'OFF' as it is not needed.

Image: Close-up of the Avantree transmitter connected to a TV's audio output.
3. Operating Instructions
3.1. No Lip-Sync Delay
The HT4189 features built-in "FastStream" Bluetooth technology, providing less than 40 ms audio latency. This ensures that audio and visuals are perfectly synchronized, enhancing your viewing experience.

Image: Person watching TV with headphones, illustrating synchronized audio and video.
3.2. Extended Range
Equipped with Class 1 Bluetooth technology, the HT4189 offers a stable and reliable connection up to 100 ft (approximately 30 meters), allowing you to move freely around your home without audio interruptions.

Image: Diagram illustrating the 100ft ultra-long range of the HT4189 compared to standard devices.
3.3. Independent Use
The HT4189 headphones can function independently as standard Bluetooth headphones, allowing you to pair them with your phone or other Bluetooth-enabled devices. They feature precision-engineered 40mm stereo drivers for quality audio.

Image: Illustration of headphones and transmitter being used separately with different devices.
4. Maintenance
4.1. Charging
The headphones provide up to 40 hours of playtime on a full charge. A full charge typically takes about 2 hours. The transmitter does not require charging; it is powered when connected to a USB port.

Image: Product box highlighting 40 hours of playtime.

Image: Headphones on a charging stand.
4.2. Cleaning and Care
To maintain the longevity of your headphones, wipe them with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials. Store in a cool, dry place when not in use.
5. Troubleshooting
5.1. No Sound / Not Working
- Check all cable connections and ensure they are fully plugged in.
- Verify that both the headphones and transmitter are connected. Their connection indicator LEDs should display a solid light. If either is flashing, reset and reconnect them.
- Confirm your TV’s audio output settings. Ensure the TV’s audio output is set to the correct source (Optical Out or Headphones Out).
- Check if your transmitter is receiving a valid audio signal. This accounts for a majority of issues.
- If using an optical connection, make sure the TV’s audio format is set to PCM.
- Ensure that nothing is connected to the TV’s HDMI ARC port, as it may interfere with audio output.

Image: Example of TV sound output settings menu, highlighting Optical and PCM options.
5.2. Sound Only from One Ear
- This issue may occur if the AUX cable is not fully plugged in. Please check the connection, or try using a different audio cable.
6. Specifications
| Feature | Detail |
|---|---|
| Model Name | BTHT-4189-BLK |
| Connectivity Technology | Bluetooth |
| Wireless Communication | Bluetooth |
| Battery Life (Headphones) | Up to 40 Hours |
| Charging Time | 2 Hours |
| Bluetooth Range | Up to 100 Feet (Class 1) |
| Earpiece Shape | Over-Ear |
| Item Weight | 196 Grams (6.9 ounces) |
| Driver Size | 40mm |
| Impedance | 32 ohm |
| Frequency Response | 20Hz-20KHz |
| Audio Codec Support (Headphone) | FastStream, SBC |
| Audio Codec Support (Transmitter) | aptX-LL, FastStream, aptX, SBC |

Image: Back of the product box displaying key features and specifications.
7. Warranty Information
Avantree products typically come with a 24-month warranty. You may be able to extend this warranty by registering your product within 30 days of purchase. Please refer to the warranty card included in your package for specific details and registration instructions.

Image: Product box highlighting warranty registration.
8. Support
For further assistance, technical support, or to access additional resources such as FAQs and video tutorials, please visit the official Avantree support website or contact their customer service.
- Official User Manual (PDF): Download PDF
- Avantree Support Website: support.avantree.com
- General Avantree Website: www.avantree.com





