TES WM-01 WM01 Power Analyzer Datalogger, Ture Arm AC & DC W/PF/ V/A Data  logging with RS232 interface  Features: 4 Group LCD ShowW,PF,V,A Easy to measure ease of use Watt(WATT;Auto Range,AC & DC) Fan Wai Resolution Accuracy(0-400Hz) Input 200W 0.1W 0.5%Reading±5The median 0-300V,0-20A,0-400Hz,PF=0-1 2000W 1W 0.5%Reading±5The median 0-300V,0-20A,0-400Hz,PF=0-1 Voltage(VOLTAGE;True RMS,Auto Range,AC & DC) Fan Wai Resolution Accuracy(0-400Hz) Overload protection 200V 0.1V 0.5%Reading±4The median 1000VDC/750VAC 750V 1V 0.5%Reading±4The median 1000VDC/750VAC Current(CURRENT;True RMS,AC & DC) Range Resolution Accuracy(0-400Hz) Overload protection 2A 0.001A 0.5%Reading±4The median 2A 20A 0.01A 0.5%Reading±4The median 20A Frequency(FREQUENCY; A sense of degrees >5V) Fan Wai Resolution Accuracy 2K-20MHz 1Hz-10KHz 0.5%Reading±2The median Power factor ( directly from the watt value, current value , voltage value ) Power factor value = watts / ( current * voltage ) Other specifications: Display:3 1/2 LCDThe maximum indicated , with functions , units, decimal point , said Overflow indicates :OL Sampling rate:2.5Times / sec Power:1.5V(UM3)*2Battery Current consumption : approx.22mA Operating ambient temperature :0~40 Working humidity:80%Relative humidity below Size:352mm(L)*300mm(W)*100mm(H) 13.9"(L)*11.8"(W)*3.9"(H) Weight: Approx.1.637kg Approximately 3.6 Pound