1.Modified sine inverter ups 2.Backup time 20-30minute 3.LCD USB and RJ45 4.CE certificaiton 5.Factory ISO9001:2008 modified sine inverter ups backup time 20-30min upslow frequency upscpu control ups High reliability with CPU control. Inner-equipped protection of over-load, short-circuit, over-voltage, low-voltage over-heatingSelf-diagnosis function, capable of detecting status at inverter and ...