Wireless Bluetooth 5.4 Receiver Transmitter Car AUX Navigation Audio Adapter 1. Receive mode: connect to audio playback devices with speakers, receive Bluetooth signals to play music wirelessly 2. Transmit mode: connect to the audio output device, transmit Bluetooth signals, play music through the paired wireless headphonesBluetooth stereo 3. Charging input: DC 5V 4. Battery capacity: 300mAh 5. Use time: about 10h 6. Charging port: Type-C 7. Charging time: about 2h 8. Transmission distance: about 10m 9. Material: ABS+PC 10. Size: about 6.2 x 3 x 1.4cm Features: 1. Receiving (RX) and transmitting (TX) signal functions in one, can be freely switched, suitable for a variety of devices 2. Bluetooth 5.4 chip, fast response speed, fast signal transmission, no delay lagging 3. In-vehicle connection, safe escort service 4. Match the 3.5mm plug headphones with Bluetooth function, stable transmission, easy to listen to songs, headphones with HD decoding function, which can present CD-level sound quality, bringing binaural immersive experience 5. Made of highly elastic TPU rubber material, designed for wall-mounted TVs, wall-mounted stereos and other devices, the surface is soft and resistant to bending, suitable for long-term use in narrow environments 6. Built-in antenna enhances the signal, unobstructed long-distance transmission within a range of about 10 meters, more stable signal