Function: 1. Can display voltage, current, power, power consumption, current reversing indication, power consumption reversing indication. 2. HTN wide viewing angle, LCD display and green backlight provide a clear view for easy reading. 3. Embedded installation with minimal wiring, very easy to install for indoor use. 4. Integrated built-in shunt design, the measurement is more accurate and convenient. 5. Upgraded PBT material , high temperature resistance, very durable for long-term use. Specification: Item Type: Energy Meter Model: PZEM-025 Material: PBT material Current: 50A Input voltage: DC5-12V Measurement voltage: DC 0-300V Product Size: Approx. 85.3 x 44 x 32 mm / 3.4 x 1.7 x 1.3 inch Application scenarios: high and low power switch cabinets, display stands, PV inverters, assembly line testing, electronics maintenance, electronic DIY etc. Package List: 1 x energy meter 1 x key 2 x cable 1 x User Manual Note: 1. This product is suitable for indoor use; 2. This product is suitable for DC; 3. Measured voltage and current must not exceed the calibration range; 4. Make sure it is properly connected. 1. How to control the backlight: Short press the button to turn the backlight on or off. 2. Reset Power Consumption: Long press the button for more than 3 seconds to clear power consumption; 3. Current Indication: The direction of the current is indicated, and the sign "-" indicates the reverse direction, otherwise it indicates the direction forward; 4. Energy consumption indicator: The energy consumption is pointing towards and "-" sign is pointing to the opposite direction, otherwise it is pointing forward; The direction of accumulation of energy consumption is judged according to the direction of the current. When the current is flowing in the forward direction, the energy consumption increases, the maximum is 999 kWh and the overflow is kept unless manually reset; when the current is reversed, the power consumption decreases, the maximum is -999KWH, and the overflow is kept unless manually reset; 5. How to work: Direct power supply: Direct power supply for test voltage; Measuring range: 8‑300V; Independent power supply: Operating voltage range: DC5‑12V; Measuring range: 0‑300V; 6. Data protection: Power consumption and backlight status can be saved after power off. Please be aware of: