1. Surface Material:metal nano (anti-reflection, high hardness, good color reducibility); 2. Power consumption;not more than 1W,work under USB 5V, electricity less than 200MA; 3. Working voltage:DC4.6~DC5V; 4. Induction way:Infrared; 5. Induced Object:Finger,pointer or any opaque objects; 6. Calibration:4 point; 7. Transmission speed:12Mbps; 8. Anti-light performance:can be used in the sun; 9. Power supply:USB(No external power); 10. Signal interface:USB1.1, USB2.0; 11. Scan speed:First dot: 25ms, continuous dot: 8ms; 12. Cursor speed:480d/s 13. Projection Ratio:4:3;16:9;16:10. 1. Package Size:1699*1217*135mm. 2. Net Weight:16kgs. 3.Gross weight: 22kgs.