Wave length:850nm or 940nm Dimensions(in nm) :5 Battery:2 XAAA IR PEN for Wiimote Interactive Whiteboard 1. Perfect for Presentation, Tutorial and Offive Meeting use 2. Utilizing the latest infrared technology 3. Case material: Aluminium alloy 4. Solid, heavy duty construction 5. Power : 2x AAA Batteries 6. Operating lifetime: 3000 to 5000 hours 7. Operation temperature: 200C—300 C 8. Storage ...