1. Product Overview
The Tianfucen BKM400 Wireless TV Headphones provide a high-quality audio experience for television viewing. Designed for comfort and ease of use, these headphones feature a USB transmitter for seamless connection to various audio sources, ensuring clear sound with minimal delay.
Image: Tianfucen BKM400 Wireless TV Headphones and USB Transmitter. The image displays the black over-ear headphones alongside the compact black USB transmitter.
2. Package Contents
Please verify that all items are present in the package:
- Tianfucen BKM400 TV Headphones
- USB Transmitter
- User Manual
- Optical Audio Cable (1)
- AUX 3.5mm Audio Cable (1)
- RCA Audio Cable (1)
- Type-C Power Cable (1)
3. Setup Instructions
The BKM400 headphones are designed for plug-and-play functionality. Follow these steps to connect your headphones to your television.
3.1. Connecting the USB Transmitter
The USB transmitter facilitates the wireless connection between your TV and the headphones. It requires power and an audio input from your TV.
Image: Mini USB Transmitter. This image shows the compact USB transmitter being held, highlighting its small size and plug-and-play design, contrasting it with a cluttered setup of another transmitter.
3.2. Connection Options
The BKM400 supports multiple audio output types from your TV. Identify the available audio output ports on your television and choose the appropriate connection method.
Image: Four Connection Options. This graphic illustrates the four different ways to connect the USB transmitter to a TV: USB, Optical Audio Out, 3.5mm Audio Out, and RCA Audio Out.
- Optical Audio Out (TOSLINK / S/PDIF):
Connect the USB transmitter to a USB port for power. Use the provided Optical Audio Cable to connect the transmitter to your TV's Digital Optical Audio Out port. Ensure your TV's audio format is set to 'PCM' and 'DOLBY/DTS' is set to 'OFF' for optimal sound.
Diagram showing Method 1 for Optical Audio connection, where the USB transmitter plugs directly into the TV's USB port and optical audio out.
Diagram showing Method 2 for Optical Audio connection, using a USB power adapter for the transmitter and connecting to the TV's optical audio out.
- 3.5mm AUX Audio Out (Headphone Jack):
Connect the USB transmitter to a USB port for power. Use the provided 3.5mm AUX Audio Cable to connect the transmitter to your TV's 3.5mm audio out port (headphone jack). Adjust your TV's sound output to 'Headset' or 'External speaker' if no sound is heard.
Diagram illustrating the 3.5mm AUX audio connection method, showing the transmitter connected to a USB port and the TV's 3.5mm audio out.
- RCA Audio Out (Red/White):
Connect the USB transmitter to a USB port for power. Use the provided RCA Audio Cable to connect the transmitter to your TV's red and white RCA audio out ports. Note: Do not use ports labeled 'COMPONENT IN' or 'VIDEO IN'. Adjust your TV's sound output to 'Headset' or 'External speaker' if no sound is heard.
Diagram showing the RCA audio connection method, with the transmitter connected to a USB port and the TV's red and white RCA audio out ports.
- USB Audio Output:
This method is applicable only if your TV's USB port supports audio output and is fully compatible with the transmitter. Plug the USB transmitter directly into your TV's USB audio output port. If no sound, please adjust the TV audio to 'USB' or try another connection method.
Diagram illustrating the USB audio output connection, where the transmitter plugs directly into the TV's USB audio output port.
3.3. Pairing the Headphones
Once the transmitter is connected to your TV and powered on:
- Long press the power button on the headphones for 3 seconds to turn them on.
- When a slow breathing blue light is visible on the headphone, pairing is successful.
Important Note: Before using the TV headphones, ensure the TV is not connected to other Bluetooth devices to avoid interference.
4. Operating Instructions
4.1. Power On/Off
- To power on, press and hold the power button on the headphones for 3 seconds.
- To power off, press and hold the power button again until the indicator light turns off.
4.2. Volume Control
Use the volume up (+) and volume down (-) buttons located on the headphones to adjust the audio level. The headphones offer 16 levels of volume adjustment (0-115dB).
Image: Louder Volume & Clearer Sound Quality. This image shows a person wearing the headphones while watching TV, alongside a diagram illustrating the internal speaker components and volume levels.
4.3. Audio Synchronization and Range
The BKM400 headphones utilize advanced Bluetooth 5.0 technology to ensure real-time audio synchronization with visuals, minimizing audio delay to an imperceptible level (less than 60ms). The extended transmission range allows for freedom of movement.
Image: Sync Your Visuals and Audio. A woman is shown wearing the headphones and watching TV, with an overlay indicating Bluetooth 5.0 and low latency (≤60ms).
The wireless range extends up to 165 feet (50 meters) in open spaces, allowing you to move around without interrupting your audio experience.
Image: Farther Transmission Distance of 165FT/50M. This image depicts a person doing laundry while wearing the headphones, with a visual representation of the wireless signal extending from the TV's transmitter.
5. Maintenance
5.1. Charging the Headphones
The headphones provide up to 20 hours of playback time on a full charge. A full charge typically takes 3 hours.
- Connect the provided Type-C Power Cable to the charging port on the headphones and to a USB power source.
- The LED indicator on the headphones will show charging status.
- We recommend using the included charging cable for optimal performance.
Image: Battery Life and Charging. This graphic shows the charging time (3 hours) and playing time (20 hours), with examples of usage duration like listening to 300 songs or watching 8 movies.
5.2. Cleaning and Storage
- Wipe the headphones with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid exposing the headphones to water or excessive moisture.
6. Troubleshooting
If you encounter issues with your Tianfucen BKM400 headphones, please refer to the following common solutions:
| Problem | Solution |
|---|---|
| No sound from headphones |
|
| Sound from both TV and headphones |
|
| Frequent disconnections or poor signal |
|
| Headphones not charging |
|
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | BKM400 |
| Connectivity Technology | Wireless (Bluetooth 5.0) |
| Wireless Range | Up to 165ft / 50m |
| Audio Delay | Low Latency (≤60ms) |
| Battery Life | 20 Hours |
| Charging Time | 3 Hours |
| Noise Control | Passive Noise Cancellation |
| Headphones Jack | 3.5 mm Jack (for wired use, not included in package) |
| Compatible Devices | Televisions, Laptops, Desktops, Tablets, Smart Speakers |
| Material | Faux Leather (earcups) |
| Item Weight | 8 Ounces |
| Product Dimensions | 9.84 x 7.48 x 3.94 inches |
| Frequency Range | 20Hz - 20,000Hz |
| Impedance | 16 Ohm |
| Control Method | Physical Buttons (Media Control, Volume Control) |
| Ear Placement | Over Ear |
8. Warranty and Support
Tianfucen products are manufactured with quality and durability in mind. The BKM400 headphones are made of high-quality materials and are designed for long-term use.
8.1. After-Sales Service
If you encounter any problems during use or have suggestions for improvement, please contact our customer support. We aim to reply within 10 hours to assist you.
For specific warranty details, please refer to the documentation provided with your purchase or contact Tianfucen customer service directly.
8.2. EU Spare Part Availability
Spare parts for this product are available for a duration of 5 years within the EU.