Features: 1. 5.2 Bluetooth Chip, More Stable Transmission 2. Dual Connection, Share Sound, Pair Two Devices To Share Your Fun Without Disturbing Others 3. Super Long Battery Life, Perfect Solution To The Limitations Of Audio Equipment 4. Suitable For Mobile Phones, Computers And Other Bluetooth Transmitting Devices 5. The Display Content Can Only Recognize English And Numbers. If There Are Other Languages, They Are Represented By "x" Description: 1. Interface: 3.5aux 2. Transmission Rate: 2.4 (Mhz) 3. Working Frequency: 200 (Mhz) 4. Whether Plug And Play: Plug And Play 5. Effective Working Radius: 15m 6. Bluetooth Standard: 5.2 7. Built-In Battery: 300 mAh Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: ABS colour: Black Package Contents: 1 x Bluetooth Transmitter And Receiver 1 x Aux Cable 1 x Data Cable 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.