Feature:1. [Ergonomic Design] Unique curved design, the wireless presenter remote conforms to ergonomics, so it will not be sore when held for a long time.2. [Wireless Connection] Using 2.4Ghz wireless technology, the presentation remote pen can remotely control the demonstration at about 10 meters.3. [Multi Functions] Comprehensive slide presentation functions, including forward, return, pause, start and black screen functions4. [Wide Application] This wireless presenter remote is a practical tool for teacher and worker to present powerpoint for speech, meeting or class.5. [Widely Compatible] This presentation clicker is suitable for Win 98,for Win se, for Win me, for Win 2000, for vista, for OS X, for Linux.Specification:Item Type: Presentation ClickerMaterial: PlasticControl Distance: Up to 10m(Approx. 10m / 10.9ys)Adapter Battery: 1 AAA Battery (Delivery Without Battery)Compatible Interface: USB 1.0 / USB 2.0Uses: Conferences, Lectures, etc.Compatible System: For Win 98,for Win se, for Win me, for Win 2000, for Win xp, for vista, for OS X, for Linux.Package List:1 xPresentation Clicker1 x Wireless Receiver1 x User Manual