... stabilizer 2,small,light,high precision 3,wide regulation,reliable 4,low loss, anti-distortion 5, CE, ISO SVC fully automatic ... It has excellent features,such as small waveform distortion,high efficiency,high power factor,free from the effort of frequency ... Relative humidity less than 95%Waveform distortion Non-lack fidelity in waveform. SVC digital display fully automatica AC voltage stabilizer