GE's Lightech LET 75 GW Ground Wire (12V/75W) GELT75A12012GW 66947 Halogen Lighting Transformer (LxWxH) 2.09"x1.29"x0.78" Dimmable with standard dimmer Input 120V AC, Output 12V AC, Max load 75W UL Listed and Approved Product Come with Ground Wire