Fangrui Product Details 1. [light Indicator] The Red Light Indicates That You Can Click The Button During The Speech, Making The Speech More Handy. 2. [upgraded Type-c Charging] The Charging Interface Is Upgraded, The Type-c Interface, And The Charging Is More Stable And Smooth. 3. [led Digital Display With Strong Endurance] Led Power Display, Large-capacity Battery, Red Indicator Light When Charging, Green When Full, And Can Be Used For 90 Days On A Single Charge. 4. [plug And Play] Usb Receiver, Compatible With Usb1.0/2.0/3.0, No Need To Install Drivers, Plug And Use, Convenient And Fast. 5. [100m Distance] Adopting 2.4g Wireless Transmission, The Signal Is Sensitive, The Long-distance Operation Is Accurate, The Speech Is Smoother, The Remote Control Distance Is 100m, And The Red Light Distance Is 200m. [wide Application Scenarios] Company Meetings, Training Speeches, Teacher Teaching, Etc.... Support Word/excel/ppt Document Format Page Turning, Support Os/android/linux/win7 And Above Operating Systems. Control Technology: R