... 5.charger inside power inverter 12vdc to 220vac 300w Product Feature:1,Microprocessor based design; 2,Input & Output isolated;3,Auto ... temperature control fan; 4,Reverse polarity protection/by fuse/diodes;5,Motor makes noise with modified ... , fan, pump and inductive loads.Low frequency dc to ac pure sine wave inverter NR series 300w 400w.Inner side:Socket(optional): ...