Feature RF and optical technology Easy to install Precision key response Easy navigation on internet Ergonomic design Suitable for various surfaces Function Sleep mode for power saving Smart Anti-jamming 128 ID Universal scrolling wheel 3D button Built-in rechargeable battery Charge from USB port Specification: Operation distance Within 2M Modulation frequency 433MHz/915MHz (depand on the market) Resolution 800DPI Compatibility Microsoft Windows95/ 98/ 2000, Me/NT4.0,Xp,Linux Port PS/2 or USB depand on requirement Size 115(L) x 62(W) x 40(H)mm Colour : Silver Black White Other colour depand on requirement Origin China Standard CE Fcc Package: Gift-Box size 18.7(L) x 15.2(W) x 5(H) cm Carton Size 58.5(L) x 44.5(W) x 32.5(H) cm 50 pcs in one carton N.W. 12.2 kgs G.W. 13.5 kgs Container 16,000pcs in 1 x 20' container