Usage Tips:Dual power automatic transfer switch, switching without interruption and switching speed in milliseconds The switch comes with two modes: manual/automatic, which can be switched at will. High-quality flame retardant, it will quickly self-extinguish when exposed to fire, preventing the spread of fire and causing more harm. Additional information 1. Manual mode can be used to switch between regular or backup power under special circumstances. 2. It can be used in single-phase AC220V power supply circuit, and the two power supplies can be generated by mains electricity. Machine, this model does not support inverter power supply. 3. It does switch conversion, not a backup power supply, that is, it cannot replace the battery. 4. Guide rail installation: 35MM standard guide rail Product name: Dual power automatic transfer switch Working voltage: 220V optional Working frequency: 50Hz/60HZ Product pole number: 2P Conversion time: approximately 30 milliseconds Operation mode: manual/automatic Electrical appliance level: PC level isolation type Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Colour:Photo Color Material:pc Package Contents: 1 x Dual Power Automatic Transfer 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.