Feature: 1. [ENSURE SAFETY] This overvoltage and undervoltage protector can manually adjust the overvoltage, undervoltage and overcurrent protection values to provide peace of mind for appliances. 2. [STABILIZED VOLTAGE] This voltage protector prevents frequent on or off of unstable voltage from causing additional damage to appliances and achieves secondary protection. 3. [DUAL DISPLAY] There are two displays on the protector with clear digital display for your convenience and reading. 4. [PC SHELL] The protector is made of PC flame retardant material as the shell, which greatly improves the safety of use. 5. [MULTIPLE FUNCTIONS] This current and voltage protector has the functions of reset mode selection, fault inquiry, and restoration of factory settings. Specification: Item Type: Over Under Voltage Protective Device Material: Flame retardant PC Current: 63A Overvoltage Protection Value Range (uvo): 240V-300V Undervoltage Protection Value Range (uve): 140V-210V Shutdown Delay Time: 2s (can be set 1-300s) Self Recovery Protection Delay Time: 30s (can be set 1-300s) Rated Frequency: 50/60Hz Error: 2% Output Contact: 1No Electrical Life: 100000 times Mechanical Life 1000000 times Protection Grade: IP20 Altitude: ≤2000m Working Temperature: -50℃-55℃ Humidity: ≤50% at 40℃ (non condensing) Humidity Temperature: -30℃-70℃. Package List: 1 x Over Under Voltage Protective Device