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 100 meters. 3[Multi Functions] Comprehensive slide presentation functions, including forward, return, pause, start and black screen functions, all in one design. 4[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 7,for Win 8, for Win XP, for Android, for OS X, for Linux. Item Type: Presentation Clicker Material: Plastic Size: Approx. 12.5 x 1.8 x 1cm / 4.9 x 0.7 x 0.4in Transmission Frequency: 2.4GHZ Wireless Technology Remote Control Distance: Up to 100m(Approx. 100m / 109.4yd) Battery Capacity: 110mah Built in Lithium Battery (Delivered with Lithium Battery) USB Version: USB 1.0 2.0 3.0 Compatible System: For Windows XP, for Windows 7, for Windows 8, for OS X, for Linux, for Android Function Purpose: Page Up and Down, Full Screen, Black Screen, Window Switching 1 x PresentationClicker 1 x Receiver 1 x Data Cable 1 x Storage Bag 1 x Chinese User Manual