Feature:1. The laser pointer embedded in the transmitter is suitable for multiscenario applications, projectors, CLP teaching, etc.2. The wireless briefing device adopts RF radio technology, and the control distance can reach ten meters3. There is no limit to the direction of use, control through obstacles, so you have the flexibility to control4. USB receiver is plug and play, no need to drive, gravity sensor cursor control, full sense of technology5. Small size, easy to carry and store, convenient to use and with good performanceSpecification:Item Type: Wireless Presenter.Wireless Frequency: 2.4GHzModulation: PWMEncoded Data: 1 millionEffective Distance: Approx. 10meter / 32.8ftTransmit Power: <5mWLaser Power: <5mWLaser Wavelength: 650nmReceiver Type: USB receiverColour: BlackMaterial: ABSNumber of Keys: 12Battery: 2 x AAA batteries (shipped without batteries)Compatible System: for Windows98/SE/ME/2000/XP/LinUX/Win7/windows /VistaProduct List: 1 x 2.4G Wireless Presenter (Without Battery)1 x USB Receiver1 x User ManualPackage List:1 x 2.4G Wireless Presenter (Without Battery)1 x USB Receiver1 x User Manual