Feature: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 overvoltage 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.Specification:Item Type: Over Under Voltage ProtectorMaterial: Flame retardant PC. Current: 1-40AOver Voltage Protection Value Range uvo: 240V-300VUnder Voltage Protection Value Range uve: 140V-210VShut Down Delay Time: 2s, 1-300s adjustable. Self Recovery Protection Delay Time: 30s, 1-300s adjustable. Rated Frequency: 50/60HzError: 2%Voltage Measurement Accuracy: 1%Rated Insulation Voltage: 400VOutput contact: 1NoElectric Life: 100,000 TimesMechanical Life 1,000,000 TimesProtection Grade: IP20Altitude: 2000mOperating Temperature: -50 -55 Humidity: 50% at 40 , non condensing. Humidity Temperature: -30 - 70.Package List:1 x Over Under Voltage Protector