Bluetooth-Compatible Audio Adapter Receive-Send 2-in-1 Sending Out One-Three Features: 1.Compact and stylish products, easy to use, USB 5V power supply, you can Long-term stability of the work of the product 2. The use of new Bluetooth-compatible 4.0 transmission technology, to maintain the CD sound quality effects 3. Built-in four Bluetooth-compatible module, one point three, can be connected to three Bluetooth-compatible peripherals at the same time audio source can be output simultaneously Specification: Bluetooth-Compatible version: V4.0 Input voltage: DC5V Input current: 500ma Power: 185mw/h Battery capacity: 650mA Working time: 2-3h Effective distance: within 8 meters Package Included: 1*Host 1*Charging cable 1*Instruction manual Only the above package content, other products are not included Note: Due to different lighting and screen settings, the item color may be slightly different from the picture. Due to different manual measurements, please allow a 1-2cm difference in size.