Description: .Mini size, receiver hidden in mouse body. .RF high speed wireless connectivity and pinpoint accuracy. .Unique optical technology, respond to even fastest movements. .800dpi fast resolution. .Reliable 2-channel digital radio technology .Operation distance up to 1.5 metres, no angle restriction. .Can glide smoothly on various surfaces except glass.　 .USB port. patible with OS Windows ME/NT/2000/XP or above. .Size: 86*51*30mm