1、Good Protector: Able to prevent the damage to electrical appliances caused by frequent switching and unstable voltage. 2、Easy Adjustment: Supports manual adjustment of overvoltage, undervoltage and overcurrent protection values, and is very simple to operate. 3、Better Display: Equipped with overvoltage protection, undervoltage protection and voltage display and measurement for electrical safety. 4、Other Functions: Has reset mode selection, fault query and factory recovery functions, and the over‑voltage and undervoltage protector is reliable. 5、Convenient Installation: Light weight, small volume, the installation of this over voltage and undervoltage protection device can be completed quickly. Item Type: Over Under Voltage Protector Material: Flame retardant PC. Current: 1-40A Over Voltage Protection Value Range uvo: 240V-300V Under Voltage Protection Value Range uve: 140V-210V Shut Down Delay Time: 2s, 1-300s adjustable. Self Recovery Protection Delay Time: 30s, 1-300s adjustable. Rated Frequency: 50/60Hz Error: 2% Voltage Measurement Accuracy: 1% Rated Insulation Voltage: 400V Output contact: 1No Electric Life: 100,000 Times Mechanical Life 1,000,000 Times Protection Grade: IP20 Altitude: ≤ 2000m Operating Temperature: -50 ℃ -55 ℃ Humidity: ≤ 50% at 40 ℃, non condensing. Humidity Temperature: -30℃ - 70℃ 1 x Over Under Voltage Protector