Computer Mouse-START Slim 2.4 GHz Optical Wireless Mouse Mice with USB Receiver For Laptop PC Macbook-White Size:115 x 60 x 20mm.Current: 1.5mA 1.5V Effective: 2.4GHz wireless transmission up to10 metres operating distance 16 wireless working channels, automatic frequency jumping Wireless carrier frequency: 2402MHz-2480MHz 3 Buttons with scroll wheel