The wireless presenter R400 is designed specifically to help you control your speech during meetings. It is equipped with red laser indicator points, which are clearly visible on most backgrounds and projection surfaces, ensuring that you do not miss key points. Its intuitive slide control function allows you to confidently and smoothly operate the presentation: built-in slide control buttons, one touch concave buttons for easy control; The lightweight and portable grip design brings a comfortable experience. Plug and play, no software installation required, ready to use out of the box. The red laser indicator point is paired with LED status lights, which are clear and eye-catching on various backgrounds and projection surfaces. The design of the portable receiver is simple and easy to use, just plug in the USB port and you can use it immediately. The battery level indicator light allows you to keep track of the power status at any time, and the power on/off button can extend the battery life. Product specifications: Material: Plastic Color: Black Effective distance: approximately 20 meters (depending on the environment) Battery: 2 AAA batteries (not included) Wireless technology: 2.4GHz USB interface Output power:<0.5mW System requirements: Windows XP/Vista/7/8/10, Mac USB interface Packing list: 1 wireless demonstration remote control 1 miniature wireless receiver