... ;bigger one PWM design, make sure the stability and high efficiency of power supply.*2, Anti-jamming, passed EMC test, wave less ... than 20MV.*3, Efficiency above 80%, exotherm less than 25 degree*4, Function: with ... power:500w*7, Non-waterproof*8, CE & ROHS certificate*9, Working tempreture: -25 to 45 degreesize:170*120*93mm 12V/24V ...