... High precision, screen digital display: frequency, voltage, current, power, power factor. 3.Quick response for status, regulating voltage response ... filter DC/AC inverter AC/DC Rectifier filter Input no fuse switch Output no fuse switch Mains power inpout 50 ... *820300GTP613030315GTP6150501200*800*1020490GTP616060600GTP611001001500*800*1020850GTP611501501800*800*10201200GTP612002001800 AC POWER SOURCE