Feature: 1. The laser pointer embedded in the transmitter is suitable for multi‑scenario applications, projectors, CLP teaching, etc. 2. The wireless briefing device adopts RF radio technology, and the control distance can reach ten meters 3. There is no limit to the direction of use, control through obstacles, so you have the flexibility to control 4. USB receiver is plug and play, no need to drive, gravity sensor cursor control, full sense of technology 5. Small size, easy to carry and store, convenient to use and with good performance Specification: Item Type: Wireless Presenter.Wireless Frequency: 2.4GHz Modulation: PWM Encoded Data: 1 million Effective Distance: Approx. 10meter / 32.8ft Transmit Power: <5mW Laser Power: <5mW Laser Wavelength: 650nm Receiver Type: USB receiver Colour: Black Material: ABS Number of Keys: 12 Battery: 2 x AAA batteries (shipped without batteries) Compatible System: for Windows98/SE/ME/2000/XP/LinUX/Win7/windows /Vista Product List: 1 x 2.4G Wireless Presenter (Without Battery) 1 x USB Receiver 1 x User Manual Package List: 1 x 2.4G Wireless Presenter (Without Battery) 1 x USB Receiver 1 x User Manual