HIFI sound quality, easy to cover the full range of high, middle and low, surround sound effect Scientific acoustic space system, dual speakers and dual diaphragms, 4D stereo treble, beautiful and full, restore live listening and enjoy an immersive experience 50 Bluetooth technology, using Bluetooth smart chip, the sound quality is clearer, natural hierarchy, improve the sound quality, and give you a more comfortable music experience Compatible with mobile phones, computers, Bluetooth devices, easy wireless connection and compatible with WINDOWS, and other operating systems Support AUX audio cable, TF card, U disk, Bluetooth, USB sound card connection and playback Type: computer speakers Connection : Bluetooth connection Interface type: USB Battery capacity: 3600mAh Frequency response range: 80HZ-20KHZ Output : 6Wx2 Signal to noise ratio: greater than equal 70db supply mode: built-in lithium battery Channel: 2 Play time: 8 hours Expansion storage: 32GB Bluetooth protocol: 50 Number of speakers: 4 Effective distance: 10 meters Function: Insert card Operation mode: button Display: None Play format: MP3, WMA, WAV, FLC, APE Whether to support APP: Yes Support format: U disk/TF card Is there a radio function: none Product weight: 13 (KG) size:495x88x57mm Material:ABS colour:Black Package Contents: 1 x Bluetooth speaker Only the above package content, other products are not included. Note: Light 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.