Craftmade T1630 Chime Transformer 30 Watts 16 Volt, Brass (2.5" x 2.13") TRANSFORMER DIMENSIONS: 2.5" High x 2.13" Wide, Weight 0.81 lbs CAPACITY : 30 Watt , 16 Volt Only COMPATIBILITY: Dual Chime Applications With All Wires More Than 50 Feet in Length UL Approved for Indoor Locations PRODUCT SATISFACTION GUARANTEED: 1 Year Limited Manufacturer's Warranty. If Not Satisfied Return to Seller for Refund with in 1 Year of Purchase