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 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. 1 x Presentation Clicker1 x Receiver1 x Data Cable1 x Storage Bag1 x Chinese User Manual Item Type: Presentation ClickerMaterial: PlasticSize: Approx. 12.5 x 1.8 x 1cm / 4.9 x 0.7 x 0.4inTransmission Frequency: 2.4GHZ Wireless TechnologyRemote 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 3.0Compatible System: For Windows XP, for Windows 7, for Windows 8, for OS X, for Linux, for AndroidFunction Purpose: Page Up and Down, Full Screen, Black Screen, Window Switching