Check the listing for details. Heath Zenith SL-122 Metal Wired MULTIPURPOSE Transformer. Condition: Open box. Listed at 9.99 USD. This Heath Zenith SL-122 wired transformer is a versatile addition to any home improvement project. Designed with a sturdy metal construction and a sleek metallic finish, it is compatible with HeathZenith brand products and can be used for a variety of purposes. The transformer comes in an open box and includes one unit per pack. Ideal for use in doorbell parts, this Heath Zenith transformer is a reliable choice for anyone looking for a durable and high-quality product. It is made from strong metal materials that ensure long-lasting use and is designed to be compatible with a range of HeathZenith products.