Features: Large screen LCD displays voltage, current, active power, and energy simultaneously. The DC voltmeter includes a power alarm threshold and overload alarm function. Memory function stores measurement data when powered off. Short press the button to turn the backlight on or off. Built-in current shunt design for convenient and time-saving operation. Specifications: Brand: PEACEFAIR Model: PZEM-031 Operating voltage: 6.5-100V DC Voltage measurement range: 6.5-100V DC Rated power: 20A / 2000W Measurement accuracy: 1.0 Weight: Approx. 78g Display ranges: 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 designed for use with 6.5-100V DC power only. Intended for indoor use only. Do not exceed the rated voltage and current. Ensure correct wiring sequence. Built-in current shunt; no external shunt required. Package includes: 1 x Voltage Current Meter