Specifications: RF Carrier: 2402-2480MHz RF operation channel: 16 Operation range: 0-10m Operation systems: Windows 98, 2000, XP, Vista, Mac OS or later Operation current: 15mA, 1.5V USB: USB 2.0 Power: 2 x AAA batteries (not included) Packing: Mini clear plastic case Color: White/Black/Pink/Blue/Green/Red/Coffee Mouse size: 112 x 57 x 20mm USB dongle size: 23 x 15 x 6mm