1. Support Bluetooth 5.0 hands-free call, no freeze, no delay, external audio source output 2. Support reading TF card and U disk 3. Real sound brings listening enjoyment Connection : Bluetooth connection Interface type: USB Frequency response range: 100HZ-20KHZ Output power: 5W Signal to noise ratio: equal 70db Power supply mode: built-in lithium battery Channel: 2 Playing time: 6 hours Bluetooth protocol: 5.0 Number of speakers: 1 Effective distance: 10 meters Operation mode: knob Play format: MP3 Support format: TF card Speaker adjustment : knob Material:Wood+plastic colour:Photo Color Package Contents: 1 * speaker 1 * USB charging cable 1 * audio cable 1 * Chinese and 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.