Description:Easy-to-use DC power analyser 4 - 60V 0 - 100A for measuring power flow in a low voltage circuit such as the flow - in Watts - and the cumulative rate of flow - in Watt-hours - from a solar panel or a DC wind generator into a battery. Simple +positive/-negative (GND) two-wire input (Source) and two-wire output (Load) for series insertion into circuit. Specification:Two-line LCD - updated every 0.4 seconds - displays eight different values:Power:0 - 6554 Watts to 0.1W resolutionCurrent:0 - 100 Amps (max) 50A continuous to 0.01A resolutionVoltage:4 - 60 Volts to 0.01V resolutionPower flow rate:0 - 6554 Watt-hours (Wh) to 0.1Wh resolutionCurrent flow rate:0 - 65 Amp-hours (Ah) to 0.001Ah resolutionpeak current in Ampspeak power in WattsVoltage minimum (dip) over monitoring periodLow in-circuit resistance just 0.001 Ohms negligible 7mA circuit load. Dimensions 84 x 50 x 20mm (L x W x D)Package Includes:1 x Watt MeterNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.