Features Short press the key to turn the backlight on or off Large LCD display shows voltage, current, active power and energy at the same time It has memory function can store measurement data when power off Built-in current shunt design, convenient to use and save your time DC voltmeter is designed with power alarm threshold, overload alarm function Features: It has a memory function can store measurement data when power off. Short press the key to turn the backlight on or off. Large LCD display shows voltage, current, active power and energy at the same time. The DC voltmeter is designed with power alarm threshold, overload alarm function. Built-in current shunt design, convenient to use and save your time. Specifications: Brand: PEACEFAIR Model No.: PZEM-031 Operating 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 0-2 kW 0 1 kW, 0.0-999.9 W ≥1kW, 1000-2000WEnergie0-9999kWh < 10kWh, 0-9999Wh ≥10kWh, 10-9999kWhVoltage6.5-100V6.50-99.99VCurrent0-20A0.00-20.00A. Note: This module is only suitable for 6.5~100V DC power supply. This module is suitable for indoors, not outdoors. The applied load cannot exceed the rated voltage and current. Wiring order cannot be wrong. Built-in current shunt design, no need to connect outside. Package includes: 1 x Voltage Current Meter Package List