Features: 1.2.4GHzwirelesspresenterpen,withabrightredlightforeasilyseeingmostbackgroundsandprojectivesurface. 2.Withbuttontopageup&down,fullscreen,blackscreen,convenientforcontrolyourslideshow. 3.WithaUSBreceivernexttothebatterycase,plugandplay,poweredby1*AAAbattery(notincluded). 4.Approx.15m/59ineffectivewirelessremotecommunicatingrange,freeforyoutowalkaround&interactwithyouraudience. 5.SupportbrowsingkindsofExcel,PowerPoint,webpage,Ebooksetc. Descriptions: 1.Ergonomicallyultra-slimdesign&compactsizeoffersyoucomfortableusingfeeling. 2.Greatassistantforteacher,lecturer,professor,scholar&otherpresenters,aswellasaidealconsiderategift. Specification: Material:Plastic RadioFrequency:2.4GHz-2.483GHz PowerSupply:1*AAABattery(notincluded) EffectiveControlDistance:Approx.15m/59in OutputPower:<5mW Current:30mA(Max) PackageIncluded: 1*Transmitter 1*USBReceiver