http://www.724depot.com/en/5-button-usb-wireless-rechargeable-optical-wheel-mouse.html

Wireless design extend your working distance
Accurate and responsive optical technology
Elegance ergonomics design
The chargeable mouse stand can also act as receiver or battery charger
Smart power management for power saving


Covering Range: 1 meter
800 DPI optical sensor
Interface: USB
Channel: 1
Buttons : 5 (One Scroll Wheel)
power: 2 x AA rechargeable battery or regular battery (not included)
Charged by mice holder (included)
Support plug and play
Frequence: 27Mhz
System Requirement: Windows 98, Windows 98SE, Windows ME, Windows 2000, Windows XP,Mac OS 8.6 or higher
Color: Silver