1、FLAME RETARDANT MATERIALS: Made of excellent flame retardant plastic materials, possess good insulation, high temperature resistant, aging resistant, safe and reliable 2、SILVER CONTACTS IMPROVE CONDUCTIVITY: Using silver contacts in this product can greatly improve the conductivity and service life of the product 3、MINIATURE AND PRACTICAL: Dual power automatic switch is a miniature household power switch, which is mainly used to test whether the main power supply or backup power supply is normal to ensure the continuity, reliability and safety of the power supply. This product is specially designed for rail installation, dedicated to PZ30 distribution box 4、MILLISECONDS SWITCHING WITHOUT INTERRUPTION: When the normal power supply is abnormal, the backup power supply works immediately, and the power supply is switched in milliseconds without interruption 5、FOR MANY PLACES: Switch to the backup power supply when there is a power failure, and switch to the main power supply when power recovery. Widely used in various places where continuous power failure is not allowed, like factories, shopping malls, nurseries, etc.