This is a Prolite 10-60va dimmable transformer for low voltage halogen lamps with a wattage between 20 - 60w. This transformer has a surge, overload and short circuit protection. It features an IP20 rating and polycarbonate plastic body. Life expectancy is 30,000 - 35,000 hours. Dimensions: 119mm (L) x 32mm(W) x20mm(H)