Fangrui Product Details 1. Br08t 2 In 1 Car Bluetooth Aux Receiver Transmitter Bluetooth Audio Adapter 2. Plug And Play, Compatible With All Devices With Aux Interface 3. Upgraded Bluetooth 5.3, Dsp Technology And A2dp Dual-core Processor, Fast Response Speed, Low Power Consumption And Stable Transmission 4. Built-in 240mah Battery, Long Battery Life 5. Receiving Mode: Receive Bluetooth Signals And Output To Speakersheadphones And Other Devices Through Aux Audio 6. One-touch Hands-free Calling: When Bluetooth Is Connected, You Can Talk Freely, Say Goodbye To The Danger Of Answering Calls While Driving, And Drive More Safely 7. Transmitting Mode: Turn The Transmitting Mode Switch To Tx, And The Bluetooth Prompt Light Will Light Up 8. Parameters: 9. Bluetooth Version: 5.3 10. Battery Capacity: 240mah 11. Working Current: 16ma 12. Charging Time: 50 Minutes 13. Bluetooth Sound Processing: With Dsp Technology And A2dp 14. Transmission Distance: 10 Meters