1,Online ups 2,IGBT technology 3,VAR,Overload and short circuit protection 4,OEM is accepted and Factory price MODELTC-1KTC-1KSTC-2KTC-2KSTC-3KTC-3KSRated Capacity(VA/W)1KVA/700W2KVA/1400W3KVA/2100WInput Voltage(118~300)VACFrequency50Hz±5Hz(adjustable)OutputVoltage220 VAC±3%Frequency50HZ±0.5%WaveformSine waveBackup TimeFull Loading6 min(s)/9 min(s)/7 minutes/Half Loading14 min(s)21 min(s)17 min(s ...