HP Wireless Premium Mouse (1JR31AA) - Connectivity: Wireless 2.4 GHz via USB nano-receiver, Buttons: 3 with 1 ID button for pairing (1 switch for power on/off), Battery type: Li-ion battery (400mAh), Resolution: 800,1000,1200,1600 DPI, LED colour: White, Minimum dimensions (W x D x H) 6.7 x 10.7 x 3.86 cm, Compatibility: Any PC with USB 1.1 port or higher, Colour: Black