Laser Pointer With Wireless RF Presenter
Color: Black / Silver
Wavelength: 650nm, 635nm
Output Power: <5mW(Class IIIA/3R);<1mW(Class II/2)
Input Power: 2 x 1.5V Batteries (AAA x 2pcs)
Laser Beam: 3 mm
Laser Color: Red
Laser Pointer Range: 500 yards
Features: One to one RF presenter; transmitter to receiver.  Anti-interfering with other transmitters. Operating on 2.4G RF frequency and can be used effectively without pointing at the receiver. You can also change slides in a presentation by scrolling forward or backward without having to be near your computer.
Easy-to-use, plug and play installation.
USB compatibility: 1.1 and 2.0  
RF Wireless frequency: 2.4GHz
Effective receiving distant: 3~6M