LET 75W 12 Volt AC Electronic transformer has electronic internal resettable protection and auto heat regulation that also automatically acts as overload protection. Waterproof potting and aluminum casing. Ambient temperature -10 degree C to +50 degrees C. Input voltage of 120V, 50-60Hz, output voltage 11.6 volts. Output wattage range 20-75 watts. Dimmable with low voltage electronic dimmer. Dimensions: 2.1 inch length x 1.3 inch width x .79 inch height.