Demonstration clicker with red light pointer -POWERPOINT clicks has 2.4GHz wireless draft, the signal is highly sensitive, not be by others, and can work normally within 100 meters. The built -in pointer meets standards of the office and classrooms. The light is bright and stable, and it can be clearly seen on any screen (LED and LCD are not recommended), even in large conference . Excellent range and response capabilities -the wireless range of this demonstrator is as high as 228 feet (70 meters), and the light range is 656 feet (200 meters), allowing you to freely leave the screen and interact with the audience freely. Wide compatibility - demonstrate compatibility with systems: 2003/XP/Vista/7/8/10, OS ( may require simple settings), Linux, Android. It supports software such as PowerPoint, PowerPoint, (Keynote&Numbers&Pages), Prezi, PDF, MS Office, ACD See, websites, etc. It is suitable for most laptops, presentation whiteboards, projectors, especially for students, teachers, mentors, lecturers, and presenters Easy to plug and 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, and then insert it into the device. The small and light PowerPoint clicks are comfortable and easy to store in their hands. Response button -as a demonstrator, it has a standard 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 and 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 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.