Feature: 1. Fast Recovery: The auto recovery voltage protective device can recover the machine in 60s. It is fast and convenient to defend our household appliances. 2. Main Application: The voltage protection relay is mainly used to defend circuit voltage instability, front end zero break, voltage entry, voltage shock caused by induced thunder and other line voltage problems. 3. Safe to Use: The shell of the voltage protective device is made of flame retardant material, which makes it safe and stable for people to use in their houses. 4. Data Display: The voltage protective device has a clear screen with a digital display, so people can also use it as a voltmeter. You can use it for 2 purposes. 5. Durable Performance: The shell of the voltage protective device is made of ABS material, sturdy and wear resistance. And the electronic components give the device a stable performance. The combination is able to defend your home efficiently. Specification: Item Type: Auto Recovery Voltage Protective Device Material: ABS Rated Voltage: 230V AC Overvoltage: AC275V±5V Undervoltage: AC170V±5V Recovery Time: 60s. Package List: 1 x Auto Recovery Voltage Protective Device