Logitech R400 2.4Ghz Wireless Presenter PPT Remote Control Pen

Transmitter:
1. Laser color: red light
2. Wireless frequency: 2.4GHz
4. Operating distance: about 15 meters
5. Laser power: less than 1mW
6. Power supply: 2 x AAA batteries (not included)
7. Size: 37.8x115.5x27.4mm
8. Weight: 57g
Receiver:
1. System: Compatible with Window Vista/7/8
2. Interface: USB
3. Size: 16.5x58.6x7.9mm
4. Weight: 6g