Item specifics: HTN wide view LCD with green backlight, displays voltage, current, energy, and power Power and energy direction display: forward and reverse direction Built-in shunt design Energy data and backlight status are retained when powered off 1. Voltage Measurement range: 0-300V (with independent power supply DC 5-12V) / 8-300V (direct power supply) Display format: e.g., 100V Note: When measured voltage is below 8V, an independent power supply must be connected. When measured voltage is above 8V, the meter can operate with or without an external power supply. 2. Current Measurement range: 0-300A (200A, 300A selectable) Display format: e.g., 100A 3. Power Measurement range: 0-90kW Display format: e.g., 10.0kW 4. Energy Measurement range: 0-999kWh Display format: e.g., 123.4kWh