Dual switch. PC level, Switch less than 8ms, no Interrupt. Only for city and Generator, not for PV system and inverter. [High Quality]The transfer switch is made of highquality flameretardant plastic material, good insulation, high temperature , antiaging, safe and reliable. [Easy to Use]The changeover switch builtin regular standby opening signal output port, which can be connected with signal indicator light, which is convenient for observation outside the cabinet. [Continuous Supply]When the normal supply is abnormal, the backup supply will work immediately to the continuity, reliability and safety of the supply. [Practical]The electronic circuit breaker is suitable for switching to the backup supply when the is cut off, and switching to the main supply when the comes in. Type: 63A size: 141 x 104 x 77.5mm Material:Plastic + Metal colour:White Package Contents: 1 x Dual 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.