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 suitable 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 suitable format page turning, support OS/Android/Linux/Win7 and above operating systems. Control technology: RF2.4GHZ Indicator light: red light Battery capacity: 180MAH Control distance: 100M Indicator light distance: about 200M Sleep current: less than 20uA : WindowsXP/7/8/9/10 OS/Linux/Android Receiver compatible interface: USB1.1/2.0/3.0 Working voltage: USB power supply (4.5-5.5V) Colour:Silver Material:ABS Package Contents: 1 x Demonstrator 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.