3-in-1 Receiver Bluetooth Transmitter with Call Aux Car Bluetooth Adapter Features: 1. Receivetransmit two-in-one, one-button switching is more convenient 2. Bluetooth 5.4 high-performance chip, stable transmission, low latency 3. Built-in high-definition noise reduction call effect, support AACSBC audio decoding, high-definition sound quality 4. Large-capacity battery, long battery life 5. Anti-bending audio plug, lightweight for use in multiple environments, can be carried with you and used as a receiver 6. 3.5mm Aux universal interface, suitable for various audio devices 7. High signal coverage, 10 meters long-distance transmission Product parameters: 1. Material: ABS 2. Bluetooth version: 5.4 3. Transmission distance: barrier-free 10m, it will vary according to the actual environment 4. Frequency: 2.4GHz-2.48GHz 5. Bluetooth transmission distance: 10 meters 6. Bluetooth receiving distance: 10 meters 7. Bluetooth receiving function: connect 1 mobile phone 8. Bluetooth transmitting function: connect 1 pair of Bluetooth headphonesBluetooth speakers 9. Battery capacity: 180mAh 10. Charging time: about 2 hours 11. Playing time: about 10 hours (receiving mode), about 8 hours (transmitting mode) 12. Product size: about 53 x 20 x 12mm