Input Power Factor Correction DC Start-up Bypass Protection No One Around Function Frequency Conversion Startup Function Long Endurance Design Self-Check Function Stable to Disturbance Possible to Collocate with Power Generator Able to Connect with Inductive Load Build-in High Quality Valve-Control Lead-Acid Storage Cell CPU control /square wave output, battery 12V7AH*1 80HZ Input rang 145-280vac output :220+/-10 300w