The switch's outer casing is made of flame-retardant material, which is resistant to high temperatures, not easily deformed, and easy to use. Sensitive response, millisecond-fast switching of power supply. Rail-mounted installation, simple and convenient, effectively protects your electrical safety and stability. Reasonable structure, small size, beautiful appearance, long service life. Silent operation, simple operation, reliable performance. The dual power automatic transfer switch is for switching between two power supplies, divided into the normal power supply and the backup power supply. When the normal power supply fails, the backup power supply will switch over. It will revert to the normal power supply after the normal power is restored. In special cases, automatic switching is not required, and manual switching can also be set by yourself. Rated operating current: 100A Rated operating voltage: 230V AC Rated frequency: 50Hz/60Hz Insulation voltage: 690V, 50Hz Electrical level: PC level Number of poles: 2P Size: About 5cm Color: White Material: plastic + metal Package Contents: 1 * Automatic Transfer Switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.