APPA99IIAC：Range:400.0mV~750VBasicAccuracy:+/-（1.3%+5d）ConversionType:TrueRMSreadingonACmodeFrequencyRes***e:40Hz~500HzOverloadProtection:1000VDCorAC750VrDCRange:400.0mV~1000VBasicAccuracy:+/-（0.25%+1d）OverloadProtection:1000Vrms)