Feature: 1. Can be used in computer, TV, for Windows, Mas, OS, for Android, for Linux, Tablet PC so on. 2. All devices with USB keyboard are plug and play, easy and convenient to use. 3. The battery is strong enough and durable. The built‑in lithium battery can be repeatedly charged. It is small and exquisite. It can be placed in the file bag or stationery bag at any time. 4. 20 Meters remote control office or conference room or classroom and everywhere use, no matter what direction control PPT, video can be used as you like. 5. Used to control for PPT and music，no need to switch switches or push buttons. turn up and down, full screen blank screen, indication hyperlink, TAB switch window control PPT. Specification: Condition: 100% Brand New Item Type: Wireless Presenter Material: ABS Model: K2 Wireless Frequency: 2.4Ghz Remote Control Range: Up to 20 meters USB: USB3.0/2.0/1.1 Light: Red light, spot ; Wavelength 650nm, power less than 5MW Battery Type: Lithium battery Battery Capacity: 300mAh Operating System: for Windows XP/Vista / 7/8, for OS, for Android Color: Black. Package List: 1 x Wireless Presenter1 x USB Receiver 1 x Charging Cable 1 x Manual