It suit Windows98/winME/2000/2003/XP/VISTA/win7 Linus& MacosMaximum output: 5mWUSB interface receiverRed laser pen: in most background can be easily seenUse distance compatible as long as 15 meters: can you make in the room free walk around and interact with the audienceLCD battery power screen: can make you understand the power balance situation, on/off switch can extend battery lifeIntuition type slide control button: can make you survey presentation materialButton a touch vested, the design of the exterior of the smooth feel perfect achievementSpecification:Model: R700Interface: USBConnectivity: wirelessPower: 5MW, 2pcs AAA batteries (not included)Laser color: redMaterial: plasticSize: 13.5x3.8cm/5.27x1.48 inch (approx)Package included:1 x Red Laser Pointer1 x USB Receiver 1 x Storage Bag 1 x English User Manual