Transformers, Low Voltage Signaling: Transformer Type - Low Voltage; Primary Volts - 120V; Number of Taps - 3; Secondary Volts - 8V - 24V; VA - max - 30; Additional Information - HxLxW: 2.18 in. x 2.50 in. x 2.31 in., Clamp-On Mount, Tri-Volt Transformer; Manufacturer Series - Series TA