Feature: 1. Compact and convenient. 2. Exquisite buttons with multiple functions: page up/down, full screen, black screen, laser pointer. 3. The effective range is up to 50 meters, giving you flexible control. 4. The mini receiver is convenient. 5. Plug and play, 1 to 1 precision control, reject serial code. 6. Safe and green materials, no radiation. 7. Low battery reminder function, rechargeable lithium battery, can be charged unlimited times. 8. Power button and standby function extend battery life. 9. Ideal tools for a variety of occasions, including presentations, teaching, conferences and work. 10. One-piece design for easy carrying. Specification: 1. Product size: 112x25x19mm. 2. Net weight: 20g. 3. Material: ABS plastic. 4. Wireless range: 50 meters (no obstacle distance). 5. RF technology: 2.4 GHz. 6. Battery: 1 lithium battery. 7. Operating system: Windows 8 / Windows 9 / Windows 7 / XP / VISTA / Linus and Mac OS. Packing list: Wireless Presenter Remote (with built-in lithium battery) x 1 Ultra-thin wireless receiver x 1 USB data cable x 1 User Manual x 1