The Wireless Presenter R400 is designed to help you make your point in a meeting. It's got a red laser pointer, is easy to see against most backgrounds and projection surfaces, you can be sure they won't miss the point. Its intuitive slideshow controls help you navigate through your presentation with confidence. Features: 1. Built-in slideshow buttons. 2. Contoured one-touch keys for easy slideshow control. 3. Lightweight, portable, comfortable handheld feeling. 3. Plug and play, no software required, makes it simple to get started. 4. Red laser pointer with LED indicator, is easy to see against most backgrounds and projection surfaces. 5. Storable receiver, easy to use, simply insert the receiver to the USB port and it can be used immediately 6. Battery-power indicator, make you understand the power's situation. 7. On/off switch, can extend the battery lifetime. 8. 2.4 GHz wireless technology. 9. USB port. Specifications: Color: Black Effective Range: Approx. 50-foot(15-meter) Battery: 2AAA batteries(Not include) Output power: 0.5mW Material: metal + plastic Package includes: 1 x Wireless Presenter Remote Control R400（Without Battery） 1 x Wireless Mini Receiver