Features: 1. 35mm DIN Rail mounting meets the standards of DIN EN50022. 2. 17.5mm pole width meets the standards of DIN43880. 3. LCD backlight digital display, no reset button, to avoid human manipulation with the data. 4. It displays electricity, voltage, current, frequency and power. 5. Red LED energy pulse signal. 6. Embedded end cover, ensuring power supply safety. 7. With the features of good reliability, small size, light weight, beautiful appearance and easy installation. 8. Adopt microelectronics and digital processing technology to measure electric energy, accurate and reliable. 9. Large scale integrated circuits and precision SMT technology, with good electromagnetic interference resistance and stable performance. Specification: Material: Plastic Model: DDM15SD Accuracy: First Grade Reference Voltage: 220V/230V 50/60Hz Reference Current (Max. Current): 5(80)A Insulating Property: 1min 4KV Alternating Voltage, 1.2/50us 6KV Waveform Impulse Voltage Display: LCD Backlight Digital Display Installation: 35mm DIN Rail Wiring Method: Up-out and down-in/up-in and down-out Power: 17000W Environment Temperature: -20~+50 Pole Width: 17.5mm/0.7in Functions: Display electricity, voltage, current, frequency, power factors Product Size: Approx. 8 * 3.7 * 6.7cm/3.1 * 1.5 * 2.6in Weight: Approx. 127.8g Package list: 1 * Energy Meter Note: Do NOT has the reset function. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.