Portable hand-held uv light instructionsA: the scope of application:1: can ... hz, power saving less noise.3: using small axial flow fan air cooling on the tubes. Light box power box ... such as indoor work must assemble ventilator, ensure indoor air flow good.4: check whether earth wire grounding.5: when the ... changing a tube, don't touch the lamp with the hand, cause a mole, on the lamp in case influence ...