Features: Large screen LCD displays voltage, current, active power, energy at the same time. The DC voltmeter is designed with power alarm threshold, overload alarm function. It has memory function can store measure data when power off. Short press the key to turn on or off the backlight. Built in current shunt design, convenient for using and saving your time. Specifications: : PEACEFAIR Model: PZEM-031 Working voltage: 6.5-100V DC Voltage test range: 6.5-100V DC Rated power: 20A / 2000W Measurement Accuracy: 1.0 Weight: Approx. 78g Test Range Display Format Power 0-2kW 1kW, 0.0-999.9W 1kW, 1000-2000W Energy 0-9999kWh 10kWh, 0-9999Wh 10kWh, 10-9999kWh Voltage 6.5-100V 6.50-99.99V Current 0-20A 0.00-20.00A Note: This module is only suitable for 6.5~100V DC power. This module is suitable for indoor, not outdoor. Applied load cannot exceed the rated voltage and current. The wiring order cannot be wrong. Built in current shunt design, don't need to connect outside. Packing Included: 1 x Voltage Current Meter