Feature: -No driver required. -Compatible port usb plug-and-play. -System: WINDOWS98/2000/ME/XP Linux & Mac OS -Control distance: up to 15m -Battery:2pcs AAA battery. -Wavelength: 650nm -Output power: < 5mw. -Measure:130*52*46mm(product).74*26*14mm(USB receiver) -Weight:60g,15g,285g(with package). -Advance radio frequency technology even work through wall. -Packing:gift box with carry bag.