Silent button reduces 90% noises, which makes it an perfect wireless mouse for office, conference room, cafe, library. Slim ergonomic design and smooth frosted Offer your hand maximum support and comfort. The mouse has a built-in rechargeable battery with a charging line. No need to change the battery. Simply plug the USB receiver and play directly, no need to install any driver. Colorful lights provide you fancy gaming environment; With switch at bottom to control the light and mouse on/off. Wide Compatibility: Works with XP, Vista, 7, 10.4 etc. Item Name: Wireless Mouse Operation : -electronic Keys Number: 4 Wireless Frequency: 2.4GHz Wireless Transmission Distance: less than or equal to 10m DPI: 1000 DPI -1200 DPI-1600DPI Charge Time: About 2h Working Time: with light on, 30 days with light off Rechargeable, optically trackable, adjustable DPI Long battery life, silent buttons, wireless transmission. Interface: USB Backlight: Seven-color breathing Battery: rechargeable battery Engine: Red light engine Colour: black Material: metal Size: 110x60x25mm Package Contents: 1 x mouse 1 x USB receiver 1 x charging cable 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.