TYPE: E160 hand shape reverse mould, human body mechanics, sanding black for sides 1. High accuracy red optical sensor, work on any surface except glass and mirror. 2. 800/1200 DPI available. 3. 28 inches/s speed and 3000 frames/s frequency, no any delay. 4. super far and free 360 degree working distance up to 20m. 5. high efficiency power management, two AAA alkaline or rechargeable battery suitable. 6. power switch, 4 level intelligent detection of auto sleep, long life of battery to 8 months. 7. NANO mini receiver can be stored neatly inside, easy to carry. 8. size: 100(L)*62(W)*38(H)mm 9. Weight: 83g ( with battery ) 10. Color: Wine red; sea blue; yellow; customise. 11. Packing: white box; blister; color box; customise.