Easy installation, rail installation and easy measurement, just connect to power and lead the wire through the hole. Help to remind you to turn off the high-power appliances, preventing safety problems and saving electricity. Made of high-grade material, it is safe, reliable and durable. High accuracy, easy to use. Wide voltage and current measurement range. Feature - Color: As Shown. - Material: Plastic+Electronic Components. - Size: 5.5 x 6.5 x 8cm. - Accuracy: 1% - voltage 80.0-300. - Current 0.0-100.0A - : 0.0-30000W - Electric energy: 0.000-99999kwh - Electric energy of cumulative time: 0.00 - 999.59h - Power factor: 1.000-0.000 - Sampling Rate: 2 times per second - Installation: Rail - Working temperature: - 10 ~+60 Temperature - Working humidity: 10-80% (no condensation) - Working Pressure: 80-106 kPa - Sunshine exposure: no direct exposure - Rail multi-function digital meter with red and green LED display. - Measures voltage, current, power factor, consumption. - Measures cumulative electrical power consumption over time. - for monitoring backup home generator system and constantly monitor the amount of power used. - for monitoring home power supply system, and to measure home power comsumption for comparison with electrical bill. - Caution: No Install Rail Include. Package list: 1 x Voltage And Current Meter