Function: Sleepmode for power saving SmartAnti-jamming 128 ID Universalscrolling wheel 3Dbutton Built-inrechargeable battery Chargefrom USB port Operation distance: Within2M Modulation frequency: 27MHz Resolution:800DPI Compatibility: Microsoft windows 9X/2000/ME/NT/XP Size: 115(L)x 62(W) x 40(H)mm Gift-Box size: 18.7(L)x 15.2(W) x 5(H) cm 50pcs in one carton Carton Size: 58.5(L)x 44.5(W) x 32.5(H) cm N.W.:11KG G.W:12KG Container: 16,000pcsin 1 x 20' container