Demonstration clicker with red light pointer -POWERPOINT clicks has RF 2.4GHz wireless draft, the signal is highly sensitive, will not be by others, can work normally within 100 meters. The built -in pointer meets stards of the office classrooms. The light is bright stable, it can be clearly seen on any screen (LED LCD are not recommended), even in large conference . Excellent range response capabilities -the wireless range of this demonstrator is as high as 228 feet (70 meters), the light range is 656 feet (200 meters), allowing you to freely leave the screen interact with the audience freely. Wide compatibility - demonstrate compatibility with various systems: Windows 2003/XP/Vista/7/8/10, OS ( may require simple settings), Linux, roid. It supports various software such as PowerPoint, PowerPoint, (KeynoteandNumbersandPages), Prezi, PDF, MS Office, ACD See, websites, etc. It is suitable for most laptops, presentation whiteboards, projectors, especially for students, teachers, mentors, lecturers, presenters Easy to plug play-no special settings are required. Just put in the AAA battery (excluding in the packaging), put the receiver (suitable for USB 1.1/2.0) under the battery cover, then insert it into the device. The small light PowerPoint clicks are comfortable easy to store in their hs. Response button -as a demonstrator, it has a stard button, such as the page up/down, black/full -screen switching. -click button is very good, you don't have to look down to promote the demonstration. Just hold the light button, the remote control can work perfectly effectively. Closing the power switch after use can help save battery. Colour:Black Material:plastic Package Contents: 2 x PPT Clicker Only the above package content, other products are not included. Note: Light reflection 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.