This low voltage hard wired doorbell transformer comes with select voltage output, allowing for use with a wide variety of doorbells. It has a voltage input of 120VAC. The transformer secures to the knockout hole in the junction box with a screw clamp (included with purchase). Low voltage hard wired transformer with selectable output Input: 120VAC Output: select from 8VAC/10VA, 16VAC/10VA or 24VAC/20VA for your specific application The transformer secures to knockout hole in the junction box with included screw clamp Mounts to all types of junction boxes 1 year limited warranty Color/Finish Family: Multiple colors/finishes Type: Doorbell transformer Package Contents: Transformer Warranty: 1-year CA Residents: Prop 65 Warning(s): No Safety Listing: ETL safety listing UNSPSC: 46171600