The appearance is simple, the volume is small, the volume is large, and the dual-speaker stereo mini does not occupy the desktop. The 360degree three-dimensional surround left and right speakers emit sound at the same time, putting you in the surround sound field. The in-line control knob adjusts the volume without clicking the mouse, and the control is free and unrestrained. 50mm large speaker passive diaphragm and mono, the speaker combination improves the bass performance and allows the bass to flow out clearly, giving you a better experience. USB power supply mode, 3.5mm audio interface, compatible with most electronic devices on the market. Type: computer speaker Interface type: USB+3.5 audio Connection : 3.5MM audio jack Input power: DC5V Speaker specification: 50mm*2 Frequency response signal-to-noise ratio: 25HZ~20KHZ Signal-to-noise ratio: equal 80db Power supply mode: USB DC 5V Input interface: 3.5mm stereo input Colour:black Material:plastic Size:64 x 61 x 86mm Package Contents: 1 x 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.