Features: 1. Bluetooth 5.2, 5 Hours Battery Life, Lossless Sound Quality, Hands-Free Call, Plug And Play, Aux Interface. 2. Bluetooth Transmission Mode (Tx): Convert Wired Audio Into Bluetooth Signal And Transmit It To Bluetooth Device Output. Bluetooth Receive Mode (Rx): Receives Bluetooth Signals And Transmits Them To Wired Audio Through A Bluetooth Connection. 3. Connect The Tv 3.5mm Audio Interface, Transmit The Sound To The Headphones Through Bluetooth, And Don'T Be Afraid To Disturb Your Family When Watching At Night. Connect To The 3.5mm Audio Interface, The Speaker Can Also Play Wirelessly Without Bluetooth Function. 4. Connect The Bluetooth Connector To The Car Aux Interface Through The Adapter, Connect The Bluetooth To The Car Audio, Not Only Make Calls, But Also Listen To Dynamic Music, So That Your Journey Is No Longer Lonely, Cd-Level Sound Quality Lossless Enjoyment: High-Resolution Restoration Lossless Sound Quality, Bring Cd-Level Music Experience Only Once, You Can Listen To Music On Your Mobile Phone. 5. Charge Once, Use 5 Hours: Built-In Rechargeable Lithium Battery, Can Be Used Continuously For 5 Hours, Convenient And Worry-Free. Bluetooth 5.2 Listening Without Card: Low Power Consumption And High Speed Stable Signal Transmission, Listening To More Smoothly. 1. Name: Bluetooth Receiver 2. Model: Bt-18 3. Bluetooth Model: V5.2 4. Effective Working Radius: 10(M) 5. External Power Supply: No External Power Supply 6. Interface: 3.5mm 7. Transfer Rate: 24 (Mbps) 8. Working Frequency: 2.4ghz (Mhz) 9.Size: 9.9 x 2 x 1.2cm 10.Color: As Shown 11.Material: ABS Package Contents: 1 x Host 1 x Charging Cable 1 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.