... canceling function built-inl High quality, high efficiency,low power consumption and favorable pricel waterproof, shockproof,high temperature resistance ... Output Open Circuit Protection:start-up continuously,power supply works constantlyBulb Sizes Available:l H-series: H1, H3, H4, H7, H8, ... H9, H10, H11, H13.l 900-series: 9004, 9005, 9006 ...