The 100W Step up/down transformer ST-100 by Seven Star is a power transformer designed for converting AC voltages from 220/240V to 110/120V and also from 110/120V to 220/240V. It features a step-up and step-down conversion function with a turns ratio of 1:10, making it suitable for various electrical equipment and supplies in business, office, and industrial settings. With a primary voltaje rating of 220/240V and a secondary voltage rating of 110V, this transformer provides reliable power conversion for a range of applications requiring precise voltage adjustments. In a good used working condition. Approx measurements - 13 x 9 x 9cm
eBay