Check the listing for details. Dual Power Automatic Transfer Switch kit 63A 4P ATS Generator Changeover Switch. Condition: New. Listed at 54.93 USD. Description This dual power automatic transfer switch can make the common power supply and backup power supply switch easily. When the common power supply is cut off, the backup power supply is supplied, and when the common power supply comes in, it is restored to the common power supply. The switching time is only 2 seconds. The automatic switchover saves you more trouble to maintain a continuous power supply. Key Features Rapid Switching: It can make the main power and backup power switch easily, and its switching time only takes 2 seconds. High Guarantee: It has been professionally certified to CB level, so it is a good product with a high guarantee and trustworthiness. Manual Automatic Integration: It is equipped with manual and automatic switching buttons. The color-giving toggle.