Transformers 16V10VA - Our Quality Transformers Thermally Protect a number of our devices.Transformers 16V10VA features include: Quality Transformers engineered to ensure long life with bells, buzzers, chimes, door openers, etc. 120 VAC Input Thermally Protected Fits Standard Wiring Knockout Class 2 Energy Limiting Type Quick Clamp mounting feature allows quick and easy installation UL/CSA Listed Order Qty of 1 = 1 Piece Below is more info on our Transformers 16V10VA