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Features: -A plug-and-play wireless receiver, No hassle setup, simply plug into your computer's USB port, there's no software to install. -About pointer: hold down the button to keep the light on. Transmitter Features: -Switch: Button -Material:ABS+Metal -Light Style: Beam light -Light Color: Red -Output Power: Less than 1mw -Battery Power: 2 Pcs 1.5vx AAA Battery (Not Included) -Frequency: 2.4GHz. -Distance: > 100m. -Wavelength: 650nm. Receiver Features: -Material: ABS+Metal -Supported OS: win 2000, XP, Vista, Win7,Win8,Win10,MAC OS, Linux Interface: USB1.1, USB2.0 USB3.0 -Control Distance: 10m-15m (The effective distance will change with the surrounding environment) Package listing: -1 x Wireless Presenter remote control -1 x USB Wireless Receiver -1 x User Manual -1 x Retail Box Note: ●The pointers should never under any circumstances be directed into people's eyes or at passing aircraft, should not to be used by children ●Do not direct the beam at people, animals or any flying objects, moving vehicles and any public or private structures.