1、Higher Safety: When the voltage is too high or too low, this volt protective device will automatically cut off the power for protection and safety. 2、Auto Recovery: No need for manual operation, the over under voltage protector relay enables auto recovery when the power restore to normal condition. 3、Wider Utility: Allows for wide application in various home appliances, the undervoltage protector can also be used for automation and production. 4、Using Good PC: Mainly premium PC material, the casing of this overvoltage protector is flame retardant, and very durable with high temperature. 5、Easy to Install: Comes with a compact size and a light weight as well, the voltage protective device is very convenient to install in minutes. Item Type: Voltage Protective Device Product Model: ZYB2-40A Rated Voltage: 220V AC Overvoltage: 240-300V, 270V in default. Under Voltage: 140-200V, 170V in default. Overcurrent: 1-40A,40A in default. Power Start Time: 1-300s, 5s in default. Recovery Time: 5-300s, 5s in default. Recovery Delay Time: 30-300s, 30s in default. Power Consumption: ≤ 2W Mechanical and Electrical Life: 100,000 Times 1 x Voltage Protective Device 1 x User Manual