Simplified 4 Buttons Presenter. To minimize the complicated design and serve all the speakers better, the slideshow clicker is only equipped with 4 compact functional buttons. To page up and down, turn to a full or black screen, power on or off, laser on or off are all at the 4 buttons. 2.4GHz Wireless Connection. Plug and play. The wireless range reaches 10m/33ft and the laser light further reaches 100m/328ft, which allows you to freely walk around no matter in the small classroom or large auditorium to interact with your audience. Intelligent Power-saving. The presenter will be on standby automatically and fall into deep sleep if there is no operation. If the battery power is running out, the indicator light will flash red 3 times to remind you of changing the battery in time. Note: the battery is not included. Easy To Use. The buttons are silicone made with a convex point design, helping you precisely locate the right button quickly. So you can pay full attention to your presentation and control the screen without even a glance at the pointer. The body is dull polished so as to provide an excellent feeling. Wide Application. The presentation clicker widely supports Windows XP/7/8/, Mac Os, Linux, and Android. The laser pointer is compatible with Microsoft, Powerpoint, Keynote, Prezi and so on. Especially for teachers, tutors, lecturers, and speakers, it helps a lot.