... .program timer,intelligent 2.automatic identify 12v/24v 3.intelligent controller PWM solar charger/intelligent controller InstructionThe model comes ... 2 meters.Features:1.program timer2.recognized 12v/24v,temprature compensate3.solar charge controller,intelligent controller4.working mode:light ... ,shorting,reverse connectionoverload,shorting,reverse connection 12v/24v PWM solar charge controller ZYTK01