Features: 1.Convenient and Practical: With the presentation clicker, you don't need to commute to your PC/laptop or need individual assistance 2.Red Indicator: Bright and steady red indicator is easy to see on any presentation screen (not recommended for LED, LCD screens). Note: Do not point it in the eyes of people or animals, please use it correctly 3.Simple Operation: The presentation clicker is plug and play, compatible for Win 98, for Win Se, for Win Me, for Win 2000, for Win XP, for OS X, for Linux etc., to meet different laptops, projectors. Perfect for teachers and speakers 4.High Sensitivity: The presentation clicker has high sensitivity, the control distance is >25 meters, you can freely control 360 in every corner of the meeting room 5.Standalone USB Receiver: The presentation clicker has a standalone USB receiver that can be used to wirelessly control while using the pointer to highlight key items. Presenter controls (page up/page down functionality) specification:Item Type: Presentation Clicker Material: ABS Frequency: 433.92/315MHz Control Distance: >25meters/27.3yd Wavelength: 650nm Operating System: For Win 98, for Win Se, for Win Me, for Win 2000, for Win XP, for OS X, for Linux Battery: 1 x AAA (not included) PackageList: 1 xPresentationClicker 1 x Receiver 1 x Storage Bag 1 x User Manual NoteShipped Without Battery