Specification :

High Quality & Compact Design
Built in Windows multimedia control is an added feature for faster use in the handy keyboard
N5901 is particularly suitable for HTPC
Being wireless the user is free from the hassle of chords and can be moved
Since it has small size, Lenovo N5901 can hold in your hands comfortably

Features:
2.4GHz wireless Mini wireless keyboard with trackball mouse
Palm-size dimensions
usb Nano Dongle
As far as 10 meters control distance
Window multimedia control
Support Window 7 / Vista / XP / 2000
Dimension: 124 x 135 x 25mm( approx.)
Weight: 107g

Package included:
1 x 2.4GHz Mini Wireless Keyboard
1 x usb Nano Dongle
1 x manual
2 x AAA Batteries