Lavalier Wireless Bluetooth 5.4 Receiver Transmitter 2 In 1 AUX Car 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: 1000mAh 5. Use time: about 60h 6. Charging port: Type-C 7. Charging time: about 2h 8. Transmission distance: about 10m 9. Material: ABS+PC 10. Size: about 7.2 x 3.2 x 1.9cm Features: 1. Equipped with a high-performance independent DAC decoder chip, the signal-to-noise ratio is over 120dB, which can restore the sound details 2. Supports HD decoding technology with high transmission rate and high sampling rate, which can provide high fidelity stereo sound 3. Bluetooth 5.3 version of the chip, fast response and efficient operation, to ensure rapid transmission of Bluetooth signals to avoid delays and lag phenomenon 4. Enable headphones with 3.5mm plug to have Bluetooth function, stable transmission, more convenient to listen to music 5. 16-600Q impedance load, can adapt to different headphone impedance, can drive professional grade hi-fi headphones, with deep rebound in low frequency, delicate and soft high frequency and clearer sound quality level sense 6. Built-in antenna enhances the signal, unobstructed long-distance transmission within a range of about 10 meters, more stable signal 7. Computer upgraded Bluetooth connection Bluetooth speakers or headphones, wireless listening more convenient, plug the computer AUX interface can be wireless listening to songs, drama, watching blockbusters, etc. Connection status is clearly visible, the transmission of non-delayed lagging 8. Built-in high sensitivity independent microphone, support high-definition voice calls on cell phones computers 9. Elastic compression back clip design, lightweight and easy to wear