Feature: 1. HIGH CONDUCTIVITY: Built in standby disconnect signal output port for easy external observation with signal indicator light, and silver alloy contacts for improved conductivity and lifespan. 2. SAFE MATERIAL: Automatic transfer switch is made of excellent flame retardant PP materials, possess good insulation, high temperature resistant, aging resistant, safe and reliable to use. 3. FAST SWITCHING: When the normal power supply is abnormal, the backup power supply works immediately, to ensure the continuity, reliability and safety of the power supply. 4. WIDE APPLICATION: Dual power toggle controller with excellent isolation, provide self investment and self compound, widely used in families, shopping malls, factories, laboratories, farms and other places. 5. DUAL OPERATION: Provides automatic and manual operation with millisecond level uninterrupted switching, with compact structure and reliable transmission, and wide application in various scenarios. Specification: Item Type: Dual Power Automatic Transfer Switch Material: Flame Retardant PP, Silver Alloy Purpose: Transfer to backup power during power outage, switch to main power when power returns Operating Frequency: 50/60HZ Rated Current: 100A Insulation Voltage: AC690V Number of Poles: 2P Rated Voltage: AC220V Rated Impulse Withstand Voltage: 8kV Operation Mode: Automatic and Manual Transfer Time: <50ms Size: Approx. 109 x 69 x 97mm / 4.29 x 2.72 x 3.82in. Package List: 1 x Dual Power Automatic Transfer Switch Note: 1. The surrounding temperature should not exceed 40°C and should not be lower than ‑5°C, with an average temperature not exceeding 35°C within 24 hours. 2. The installation location should not be higher than 2000m above sea level. 3. When the maximum temperature reaches 40°C, the relative humidity of the installation site should not exceed 50%; when the temperature is at the lowest ‑5°C, the relative humidity is higher, for example, at a temperature of 25°C, the relative humidity would be 90%. Due to temperature changes, special measures should be taken to address occasional condensation on the product surfaces.