Adjustable Voltage Surge Protector: The outlet surge protector has an adjustable minimum and maximum voltage. It can be adjusted according to your needs when the product is energized. Press the "SET" key and adjust the high/low voltage protection value and delay value of the protector through the "+" and "-" keys (the adjustable position is on the side) Security Protection-Over/under Voltage: BSEED small surge protector will automatically cuts off power when your equipment is affected by various electrical problems such as voltage fluctuations, power outages, and surges, preventing appliances from being damaged by too low or too high a voltage Premium Flame Retardant Material: The appliance surge protector is made of high quality ABS material. It makes our home electricity monitor more durable and fire resistant. The flame retardant material can meet the UL94-V-1.0 grade test and experiment standard.Enough peace of mind to play a safe and protective role