Product features: Ai voice intercom, Bluetooth connection playback, Bluetooth hands-free call, clock display, alarm clock setting, RGB breathing light, TF card playback, FM radio, USB sound card, TWS couplet, spectrum display, AUX external audio input. Audio output power:6W() Distortion:+N=1% Frequency response:40HZ-17KHZ Bluetooth version: 5.1+ Product name:Mecha Little Bluetooth Audio Product model:M10 Bluetooth transmission frequency:2.4-2.48G Receiving distance:5-15m Charging voltage and current:DC 5V1 Battery capacity:1800mAh Power supply voltage:3.7V/18650 lithium battery Horn size:40 square external magnetic PU edge 4R-5W Product size:134.56x120.29x133.56mm Colour:A:Black Material:Plastic Package Contents: 1 * Bluetooth Speaker 1 * USB 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.