brand name; Jiangxi stel Output Power: 200W 300w 500w 800W 1000w 3000W etc. Input Voltage: DC 12V ... Stel inverter apply in car,marine,solar electric power/wind electric power,motive office,offer power to emergency work,outside work.2),Stel ... control cooling fanOutput Frequency60±3HZ/50±2HZTwo-color indicators display power and fault statusUSB OutputNoProtections:short circuit,overload,over temperature, ...