[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. Dual switch. PC level, Switch less than 8ms, no Interrupt. Only for city and Generator, not for PV system and inverter. Style:100A Colour:White Material:Plastic + Metal Size:1055 x 104 x 755mm Package Contents: 1 * 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.