switch. PC level, no Interrupt. The dual-power automatic transfer switch () is a newly developed miniature household power transfer switch, is mainly used to test whether the main power or reserve power is normal. When the normal power supply is abnormal, the reserve power supply will work immediately to continuity, reliability and safety of the power supply. It is specially designed for household rail installation for PZ30 distribution box. The is suitable for emergency power supply of AC50 or 60Hz and rated voltage 220V. It is featured with structure, transfer, easy installation and maintenance, and , is widely used in where frequent power outage is not allowed. Only for power and Generator, not for PV system and Inverter. Type: 100A size: 107 x 96 x 76mm Material: PC plastic colour: white + black Package Contents: 1 x Automatic Transfer Switch Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.