Over Under Voltage Protector Electricity Usage Monitor Power Voltmeter Features: 1. Intelligent over-voltage and under-voltage protector, with high-quality ABS flame-retardant shell, safer to use. 2. Exquisite appearance, light and convenient, accurate measurement, easy rail installation. 3. Voltage, current and power display three-in-one on the same screen, clear data, clear at a glance. 4. Overvoltage and undervoltage recovery values ??are adjustable, overcurrent automatically disconnects, overvoltage automatically disconnects. 5. With voltage and current over-high or under-low protection, stable operation, stable performance, strong anti-interference. 6. Wide range of applications: suitable for factories, laboratories, power monitoring, automation and other occasions, can meet the measurement of different equipment. Specifications: 1. Voltage: AC 220V230V (universal) 5060Hz 2. Current range: 1~40A, 1~63A (selectable) 3. Capacity range: 0~9999Kwh 4. Undervoltage protection: 140~210V 5. Overvoltage protection: 230~300V 6. Guide rail size: 35mm 7. Product size: 85 x 65 x 36mm