Features Safe and Fireproof The protector adopts PC flame retardant material, with surge protection, undervoltage protection and voltage display (voltage measurement), more safe and reliable to use. SMART ADJUSTMENT: Multi-function protector provides safe protection for electrical appliances, manual adjustment of the protection value against over-voltage, under-voltage, and over-current. EFFECTIVE PROTECTION: A surge protection device can prevent unstable voltages from turning on and off frequently to cause additional damage to electrical appliances, in order to achieve secondary protection. DELAYED POWER UP: The power supply will be restored automatically after 1-600s after the voltage stabilized, which can protect your devices well. Three displays: current limit protector display voltage, current, KWH, reading more intuitive and convenient Specification: Item Type: Surge Protector Material: Fireproof PC Nominal supply voltage: AC220V Operating Voltage Range: AC80V-400V (Single Item) Rated frequency: 50/60Hz Current adjustment range (> A): 1-63A Surge adjustment range (> U): AC230-300V Under voltage adjustment range (< U): AC210-120V Protection value KWH:1-9999 Rated Current: 63A > Trigger delay U and < U: 0.5S Reset or start time:1-600S Voltage measurement accuracy: 1% (no more than 1% of total range) Rated insulation voltage: 400V Output contact: 1NO Electrical life: 100,000 Mechanical life: 10000000. Protection level: IP20. Pollution Level: 3 Altitude: ≤2000 meters Operating temperature: -50℃-55℃ Humidity: ≤50% at 40℃(non-condensing) Storage temperature: -30℃-70℃ Product features: 1. Surge Protection 2. Undervoltage Protection 3. Voltage display (voltage measurement) 4. Surge protection value is adjustable 5. Overpressure recovery value is adjustable 6. The operating time of the surge protection is adjustable 7. The undervoltage protection value is adjustable 8. The undervoltage recovery value is adjustable Size (L x W x T): approx. 86 x 38 x 68 mm/3.39 x 1.5 x 2.68 inches. Rail Size: Approx. 36 mm/1.42 inches. Package List: 1 x Surge Protector Package List 1 x Over Under Voltage Protector