Function buttons:

1.  Red laser pointer light control

2.  Wireless presenter, USB plug and play. Page up (long press work as full screen), page down  (long press work as black screen)

3.  Switch on / off

Product spec:

Transmitter

Remote control: RF

RF frequency: 2.4GHz

Control range: 30m

Laser: 3R laser pointer

Output power: <5mw

Laser range: >20m

Laser wave: 650nm, red pointer

Working voltage: 1.5V

Sleeping current: <100uA

Battery: 1*AAA battery

Size: 138.8*17.6*15mm

Weight: 18.6g

Receiver

Operating system: Windows, Mac OS, Linux, Android

USB version: USB1.1, USB 2.0/3.0 support

Working voltage: 4.5-5.5V

Size: 24.7*13.8*5.14mm

Weight: 1.6g