Description Input: 5V 2A USB-C Battery capacity: 1800mAh Bluetooth version: V5.0 Transmission distance: 10 meters Signal to noise ratio: 75dB Distortion:Less than 10 Output power: 2 x 5W Frequency response range: 100Hz-20kHz Function: 8 types of white noise/smart Bluetooth speaker/timing function/support for headphone external connection The product will be constantly upgraded, and the appearance and color may change. Please do not mind. If you have requirements for color or appearance, consider them before placing an order. Colour:Green Material:Plastic Package Contents: 1 x 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.