wireless 3D optical mouse 800 dpi resolution,27MHz radio frequency Compatible with Windows 98/ME/NET/2000/XP working on any surface except glass valid within 1.5 meters diffrent colors are availible item size:85*50*28MM white paper box packing:95*60*30mm 100pcs/ctn NW:7.8KG, GW:8.5KG Meas:47.5*30*21cm