... distance of 3.5meters highOperating frequency50-60HzOperating Temperature-20°C, +60°CStorage Temperature-30°C, +70°CNet Weight per piece (g)160gCertificationCE Approved; RoHS ... by Remote controller, and the brightness level is 10%,20%,30%,40%,50%,60%,70%,80%,90%,100%.