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 /'t miss the point. Its intuitive slideshow controls help you navigate through your presentation with confidence. Built-in slideshow buttons. Contoured one-touch keys for easy slideshow control. , portable, comfortable handheld feeling. Plug and play, no software required, makes it simple to get started. Red Laser-pointer with LED indicator, is easy to see against most backgrounds and projection surfaces. Storable receiver ,easy to use, simply insert the receiver to USB port and it can be used immediately. Battery-power indicator, make you understand the power's situation. switch, can extend the battery . size: 112 x 34.5mm Material: plastic colour: black Package Contents: 1 x Wireless Presenter Remote Control (2 AAA batteries not included) Only the above package content, other products are not included. Note: Light 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.