Dear: High Quality・wish you like it! Keep your audience in the palm of your handContoured one-touch keys for easy slideshow control Red laser pointer brings your important points to lightUp to 50-foot wireless rangeFeel free to relax and move around the roomPlug-and-play wireless receiver is easy to use、 easy to storeTechnical Specification?∴ Built-in slideshow buttons?∴ 50-foot (15-meter) effective range with 2.4 GHz wireless technology?∴ Red laser pointer with LED indicator?∴ Plug-and-play、 no software required?∴ Storable receiver?∴ Battery-power indicator?∴ On/Off switchSystem Requirements?∴ Windows XP、 Windows Vista、 or Windows 7 or 8?∴ USB portTechnical DetailsDimensions: Wireless Presenter 115.5*37.6*27.4mm Receive 58*16.6*7.9mmBatteries: 2 AAA batteries requiredInterface: USB3.0、 USB2.0/1.1Color: BlackPackage Contents?∴1 x Wireless Presenter?∴1 x Wireless mini receiver?∴1 x Instruction