mouse: ABS / 9.7 ( l ) x 6.1 ( w ) x 2.2 ( h ) / version 2.0 / 800 DPI / low battery power LED indicator / auto-power-saving sleeping function / 2 x AAA rechargeable NiMH batteries included
USB receiver-charger base: 9.4 ( l ) x 5.6 ( w ) x 3.5 ( h ) / no batteries required; recharges via USB port