Craftmade T1615 Chime Transformer 15 Watts 16 Volt, Brass (2.25" x 1.9") TRANSFORMER DIMENSIONS: 2.25" High x 1.9" Wide, Weight 0.38 Lb CAPACITY : 15 Watt , 16 Volt Only COMPATIBILITY: Single Or 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