Bluetooth version: 5.0 USB charging input voltage: 5V Battery capacity: 300mAh Speaker rated power output 3W Lithium battery specifications; 3.7V Signal-to-noise ratio:90HZ-20K/65dB Equipped with MP3 AAC audio decoding function Compatible with A2DPAVRCP high-quality stereo audio transmission and remote control protocol Support mobile phone Bluetooth hands-free (HFP protocol) Bluetooth band: 2.4000GHZ--2.4835GHZ The effective wireless transmission distance is up to 10 meters Color: Black Material: plastic Package Contents: 1x Bluetooth speaker 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.