1：Brand/Model: M40 2：Color: Black, Silver. 3：Material: ABS 4：Key life: 5 million times 5：Wireless distance: 10m 6：Work: Photoelectricity 7：Battery capacity:500mAh（Chargeable lithium battery） 8：Charging cable length: 25cm 9：Project Type: Ergonomics Optical Mouse 10: Resolution: 800,1200,1600.(1200dpi Default) 11: Operation Mode:Opto-electronic 12: Rated voltage / current: 3.7V / 18mA 13: Power Type: Rechargeable（Charging time 2h，Working time 150h） 14: Type: 2.4Ghz Wireless mouse 15：Buttons: 2 Buttons and 1 Round (Middle Mutton) and Dpi key 16: System requirements: Windows 98 / Me / 2000 / XP / Vista / Win 7 / Win8 / 10/Vista Mac OS or latest. 17: Product weight:67g 18: Item size: 11.2 *5.8 * 2.5cm Installation and use steps: 1. Remove the wireless mouse from the box. 2. Remove the mini receiver installed in the bottom of the mouse, insert the computer's USB interface, free code, plug and play. 1、2.4G Wireless Transmission Technology. 10M wireless receiving distance. 2、 Third gear DPI adjustment design. 3、 Quiet and elegant office wireless mouse. Colorful glow, more cool. 4、 High resolution: Max 1600 DPI high resolution for fluid motion. 5、 Fashionable slim design: Slim design for sleek look and portable use. 1 * 2.4 G Wireless Mouse 1 * USB Receiver 1 * USB Charging Cable(25cm)