①. Specifications: 1.Color: Black; 2. Effective Range: Approx. 50-foot(15-meter); 3. Battery: 2AAA batteries(Not include); 4. 2.4 GHz wireless technology; 5. USB port. ②. Specifications: R400 2.4Ghz Wireless USB Receiver Presenter Pointer Pen Page Turning pen Remote Control for Powerpoint Presentation For Office. ③. Overview: The Wireless Presenter R400 is designed to help you make your point in a meeting. It has a red light spot, which is easy to see against most backgrounds and projection surfaces, so you can be sure they won't miss the point. Its intuitive slideshow controls help you navigate through your presentation with confidence. ④. Features: 1. Built-in slideshow buttons; 2. Contoured one-touch keys for easy slideshow control; 3. Lightweight, portable, comfortable handheld feeling; 4. Plug and play, no software required, making it simple to get started; 5. Page turning pen with a red light spot, easy to see against most backgrounds and projection surfaces; 6. Battery-power indicator, allowing you to understand the power situation; 7. On/off switch, which can extend the battery lifetime; 8. Select imported IC, fast response, stable and reliable, 2.4G long-distance remote control, high-speed transmission. ⑤. Package Included: 1 x Wireless Presenter Remote Control R400; 1 x Wireless Mini Receiver.