Brand Rapoo Model 3920P Quantity 1 Color Black + grey Material ABS Connection Method Wireless Bluetooth Version No Connection Type USB Operation Distance 10 meter Tracking Method Laser Laser Type Red Laser Resolution 1600 dpi Power Supply 2 x AA batteries (included) OS System Windows XP / Vista / Win 7 Other Superstrong anti-interference 5GHz wireless transmission avoid the interference from Wi-Fi Bluetooth to ensure the stability of wireless transmission; Unbounded laser technology Freely adjustable high-precision laser engine lets the mouse moves freely on almost all surface (even on glass); Save time by customized buttons such as forward back tilt-wheel zoom-in zoom-out etc.; Quickly respond to what is needed Packing List 1 x Mouse 1 x Nano receiver 2 x AA alkaline batteries 1 x Multilanguage user manual