Specifications:Color: BlackNet Weight: 61gWorking Distance: 10m(Max.)Wireless Technology: 2.4GHzUnit Size: Approx.10.7(L) x 7.0(W) x 3.7(H)cmPower Supply: 2 x 1.5V AAA battery(not included)System Support: Windows ME/ 2000/ XP/ Vista/ 7/ 98 Package Included£º1 x Mini Receiver1 x 2.4G Wireless Mouse