Model : iball - Presenter Cordless 

Features
Cordless Trackball technology
Built-in laser pointer
Ergonomic design, fits comfortably in your hand
Very convenient and easy to use
Plug-n-play, no drivers required

Interface : USB/PS2 combo interface

Buttons : 3 Buttons

Laser Pointer : Built-in laser pointer for presentation

Cordless Technology : Digital RF cordless technology

Effective Range : 30 feet

Batteries :  2 AAA batteries

OS Supported : Plug-n-play with Windows 98SE / ME / 2000 / XP / Vista

Warranty : 1 Year.