2.4ghz wireless ergonomics trackball keyboard

Keyboard Feature:
1: 2.4GHz RF Wireless Technology
2: Intelligent Frequency Hopping Technology
3: 10 meters stable & effective distance
4: USB Port, nano receiver, plug & forget
5: Intelligent energy saving
6: 10 million times keystroke lifetime
7: Build-in opticalTrackballl for Easy Control of Mouse Function
8: 15 Hot Keys Multimedia Keyboard
9: Ergonomic Design with Comfort Palm rest
10: Fit with Various Industrial and Professional Use
11: Build-in 2x USB2.0 Hubs

System Requirements
IBM or Compatible PC System
Win Me/2000/XP/Vista