Features: 110V/220V automatic conversion switches, designs for home track installation, dedicated to PZ30 distribution box. Automatically switches the switches to use manual mode to ensuring the left switches is in manual condition. This 2P double power supply ATS ensuring a stable power supply, suitable for situations where power outages cannot be continuously, and is ideal for highly demand equipment. Make of Plastic, high strength, highly temperature resistance, excellent insulation performances. Easy Installation: Din rails Type mounting simplifies setups, great for various indoor environment. Specifications: Component: Plastic Standard voltages: 110V/220V Size: about 10.3x10.7x7.8cm/4.06x4.21x3.07inch Package Includes: 1pc Double Power Automatic Transfer Switches note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.