Connectors：Mini USB Power & Batteries
Batteries Included：No
Battery Form Factor：AAA
Required Battery Count：3 Wireless Devices
Transmission Distance (Maximum)：20 meters
Transmission Frequency：2.4Ghz Package
Package Type：Retail Dimensions us | metric
Depth：27 mm
Height：200 mm
Width：59 mm
Product Weight：125 g
Details:2.4GHz wireless transmission technology
Features a built-mouse in the middle
Supports Windows 98/ME/NT/2000/XP/Vistor