1. 100% Brand New，quality is very high.
2. 2.4GHz wireless transmission up to 10 meters operating distance.
3. Built-In mouse memory， no recording is needed after battery replacement.
4. Including Scroll Wheel， Page Forward and Page Backward buttons for easy Internet
Specifications:
length*width*heigh=10.16cmX4cmX1.5cm=4in x 1.575in x 0.59 in
Transverse width=5CM=1.9685in
Operation systems:for Windows 2000， Me， XP， Vista， Win 7 and for Mac.
Power:2 x AAA battery (not included).
Rated operation current: 15mA， 1.5V.
Color: Red.
Package include:
1 x 2.4GHz Wireless Portable Optical Mouse1 X USB receiver
