Power Transfer Switch; Senses Generator Power And Prevents Two Power Sources From Entering AC Distribution Panel At The Same Time; Automatic; 120 Volt AC; 30 Amp; Quick Flip Lever Lock Connectors; 9.25 Inch Length x 7.28 Inch Width x 4.2 Inch Height; With Built-in Strain Reliefs/ Time Delay/ Quick Change Circuit Board Automatically senses generator power and prevents two power sources from entering the AC Distribution Panel at the same time. Type: Automatic Voltage: 120 Volt Ampere Rating: 30 Amp Terminal Type: Screw Length (IN): 9-1/4 Inch Width (IN): 7.28 Inch Height (IN): 4.2 Inch Color: Black Material: Plastic Mounting Type: Wall Mount Features & Benefits Time Delay Feature Ensures Generator Voltage Is At A Stable Level Before Transfer Occurs Built-In Strain Reliefs Allow The Installer To Simply Push The Branch Circuit Wires Inside The Unit For Connection Quick Change Circuit Board Is Easily Replaced In The Event Of Failure; No Need To Disconnect And Reinstall The Entire Unit Eliminates The Need To Purchase And Install Separate Strain Reliefs For Each Circuit Limited 1 Year Warranty