Features: 100% Brand New.Color: BlackTransmitting frequency: 2.4GHzSimple and easy to usePlug and Playlaser wavelength: 650mmLaser power: <5mwLaser range: >500mNice touch feeling、 comfort to hold by handLaser emissive power below 0.5mWComplies with IDA standards DA103073System: Windows 2000/XP/VistaPower supply: 1 x AAA battery (NOT included)Dimension: 106*38*26mmColor: blackPackage Content:1 x Wireless presenter1 x USB wireless receiver