The multi-functional 2.4GHz wireless laser presenter is a great tool for PowerPoint presentations. Just gently press the relevant function button, you can control your ducuments on your laptop and can interact with your audiences at the same time. You can simply press the laser button and a red point will appear to emphasize the contents you need to highlight on the screen. It is a good assistant for teacher, trainer, professor, emcee, business man and more. Specially designed for easily controlling Smart TV, Android TV Box, Smart Projector, PC and more. Plug and play, simple and smooth.