HEH1017 Features: * Wired door chime transformer * Material: Metal * Transformer is a tri-volt / clamp-on type * Low voltage hardwired transformer * Wired door chime transformer Specifications: * Input: 120 VAC * Output: 8 VAC-10 VA, 16 VAC-10 VA, 24 VAC-20 VA Assembly Instructions: * No assembly required Dimensions: * Dimensions: 2.13"" H x 2.5"" W x 2.25"" D Warranty: * 1 Year manufacturer"s warranty