This is a step-down Dry - power transformer manufactured by Acme Electric, with a model number of T279740S. It has a primary current rating of 120/208/240/277 VAC and a secondary current rating of 120/240 VAC. The transformer has a turns ratio of 1:20 and can handle up to 1000 watts of power. Its dimensions are 5" deep x 5.5"wide  x 9.5".tall wall mount