INPUT REQUIRED: INPUT VOLTAGE RANGE：11.4VDC—12.6VDC INCOMING CURRENT RANGE：28.0A Max @11.4VDC INPUT SURGING CURRENT：12.0Amax@12VDC WORK EFFICIENCY：≥85% Environment description: Working temperature/humidity-5℃to 55℃/ 45%-75% Reposition temperature//humidity-40℃to +70℃/ 10%-90% Atmospheric pressure86Kpa—106Kpa Defencive function （for+3.3V，+12V,+5.00V&+5.00VSB power output） OCP： output shut down when output current reaches the peak point. Short-circuit protection：output shut down when short-circuit.