It suit Windows98/winME/2000/2003/XP/VISTA/win7 Linus& Macos Maximum output: 5mW USB interface receiver Red laser pen: in most background can be easily seen Use distance for as long as 15 meters: can you make in the room free walk around and interact with the audience LCD battery power screen: can make you understand the power balance situation, on/off switch can extend battery life Intuition type slide control button: can make you survey presentation material Button a touch vested, the design of the exterior of the smooth feel perfect achievement Specification: Model: R700 Interface: USB Connectivity: wireless Power: 5MW, 2pcs AAA batteries (not included) Laser color: red Material: plastic Size: 13.5x3.8cm/5.27x1.48inch (approx) Package included: 1 x Red Laser Pointer 1 x USB Receiver 1 x Storage Bag 1 x English User Manual