1. Built-in 8000 mAh battery, not only can be used as a wireless subwoofer, but also can charge the phone. 2. Touch Bluetooth subwoofer, stereo dual speaker design, compatible with Bluetooth mobile phones, tablets and other devices. 3. This 360-degree surround sound of the Bluetooth speaker lets you feel immersive while listening to music, providing you with the perfect music experience. 4. 3D button design, sensitive touch, easy to operate, the operation is not easy to make mistakes. 5. The refined appearance and design make this product the for giving gift for friends. Bluetooth Version: 5.0 Battery capacity: 8000mAh Support music format: MP3, WAV Support format: U disk Operation method: Touch control Play time:20hours Function: Bluetooth speaker. charging mobile phone, U disk plakback, TF Card playback, 3,5mm audio Input, and AUX, Color: Black Material: plastic Package Contents: 1 x Bluetooth speaker 1 x data cable 1 x audio 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.