1. Automatic transfer switch can switch between normal power and reserve power automatically. This switch prioritizes normal power. If normal power is available, the switch will connect to normal power. If normal power fails and reserve power is available, the switch will transfer to reserve power. 2. Wiring: Press the button to Automatic mode for automatic switching between normal and reserve power. Press the button to Manual mode to manually select the power source. 3. The Automatic Transfer Switch is a terminal type automatic transfer device suitable for 3-phase 4-wire (or 1-phase 2-wire) AC 50/60Hz systems, with a rated voltage of 230V and maximum current of 63A. When a power failure occurs (voltage loss or phase loss detected on Phase A of either source), it automatically transfers the load circuits from the failed source to the active source to maintain power supply. Rated voltage: AC 230V 50/60Hz Note: Power interruption may occur during switching. Maximum current: 63A Color: Grey + Black + Blue Material: PC plastic Package Contents: 1 x Automatic Transfer Switch Only the above package content is included; other items are not included. Note: Lighting and display differences may cause slight variations in color representation. Measurement error is +/- 1-3 cm.