1. Working voltage :AC 220V/50HZ 2. Workeng environment Temperature:-40∼60 Related humidity:10∼90 3. Grey scale color :4096 grades for R,G and B,Display≥16.7M colors(synchronized) 4. Brightness adjustment Manual: adjustment:256 levels, Automatic 5. adjustment:8 grades 6. Control system: Synchronous/off-line control system,Network cable or optical fiber transmission 7. MTBF :>10000 hours 8. Life-span :>100000 hours