... greater than 72 hScreen lifespan:more than 100,000h System lifespan:more than 100,000hNon-failure time average ... and power fails protection deviceWorking voltage: three phase five wire system ,AC380V±10% ,AC220±10% ,50Hz±5%Video ... 1,000 nits adjustable.• With SMPTE TV color correction system,make image more ample.• Security low current in R ... switch,enlarging or diminishing video image. LED displays