[High Quality]The transfer switch is made of high‑quality flame‑retardant plastic material, good insulation, high temperature resistance, anti‑aging, safe and reliable. [Easy to Use]The changeover switch built‑in regular standby opening signal output port, which can be connected with signal indicator light, which is convenient for observation outside the cabinet. [Continuous Power Supply]When the normal power supply is abnormal, the backup power supply will work immediately to ensure the continuity, reliability and safety of the power supply. [Practical]The electronic circuit breaker is suitable for switching to the backup power supply when the power is cut off, and switching to the main power supply when the power comes in. Dual power switch. PC level, Switch less than 8ms, no Interrupt. Only for city power and Generator, not for PV system and inverter. Style:63A / 100A / 125A Colour:White Material:Plastic + Metal Size:105.5 x 104 x 75.5mm Package Contents: 1 * Dual power switch Only the above package content, other products are not included. Note: Light reflection 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.