Specifications: 1.Color: Black 2. Effective Range: Approx. 50-foot(15-meter) 3. Battery: 2AAA batterier(Not include) 4. 2.4 GHz wireless technology. 5. USB port   Specifications: R400 2.4Ghz Wireless USB Receiver Presenter Pointer Pen Page Turning pen Remote Control for Powerpoint Presentation For Office   Overview: The Wireless Presenter R400, is designed to help you make your point in a meeting. it has a red light spot, 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. Plud and play, no software required, makes it simple to get started. 4. Page turning pen with a red light spot, is easy to see against most backgrounds and projection surfaces. 5. Storable receiver ,easy to use, simply insert the receiver to 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.Select imported IC, fast response, stable and reliable, 2.4G long-distance remote control, high-speed transmission.   Package Included: Package include 1 x Wireless Presenter Remote Control R400 1 x Wireless Mini Receiver