Easy installation, easy to 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 measurement range. Feature - Color: As Shown. - Material: Plastic+Electronic Components. - Size: 5.5 x 6.5 x 8cm. - Measurement accuracy: + 1% - Display: 0.5 inch LED digital tube (voltage red display, green display) - Measurement range: voltage 80-300V. - : 0.2-99.9A (more than 100A requires additional ) - Power consumption <0.2VA - Measuring speed: about 2 times per second - According to installation width: = 3P (DZ47/ , air position) - Measures voltage, , 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 Meter