... example:DVD, Fan,TV etc)Technical parameter of LCD UPS Inverter RT2020 500 VA-2000VAModelRT2020 500-2000VA500-121000-122000-241000-24Capacity500VA ... waveSwitch timeStandard 2~4ms Typical 6msCurrentCharge Current10A10A10A6ADC Voltage12V12V24V24VOvercharge Protection15V15V30V30VDisplayLCDUPS Status, Input/output Voltage and Frequency, Load, AC,battery ,fault, etcOperating EnvironmentTemperature0°C ...