10-60W 120V to 12V Dimmable Transformer UL approved Fully dimmable With standard TRIAC dimmers Suitable for Halogen Lights ONLY, will not work with LED. Single Input 120VAC, +-6%, 50/60 Hz, 0.5A, PF&gt;0.98 Output 11.5V +-6%, min load 10W, max load 60W Approvals: UL, cUL class 2, CE, FCC, RoHS