Power factor: > 99% Prolong lamp lifespan at least 10%, 3 year factory warranty Runs on 120/240 volt power, 50/60 hertz Suitable for HPS and MH bulb of America and Europe Standard Protection function: short circuit /circuit/overheat/lamp failure protection Energ-saving up to 30% compared with magnetic ballast Elimination of lamp flicker Good regulation agaist supply voltage variation Thermal protection at 105 degree C and restart at 55 degree C Ballast noise rated class A Color: Blue, silver, black Usage temperature:-40 to 65 degree C Caution: Only professional allowed to do below operation Before assembly&maintenance, please make sure the power is cut off Before fixing cord, check if voltage is ok and check cable before other cables The product can just work with HPS&MH lamps only The product for indoor use only