The Friedland D753 8V 1A bell transformer is the ideal transformer for your wired chime installation. The transformer is designed for surface mounting and operates across a voltage of 220 to 240V 50Hz. The entire range of Friedland transformers are KEMA and VDE certified and are all built with the "fail-safe" design meaning once a short circuit occurs they cannot be reset and reused. They also conform to IEC 61558-2-8 making them a very safe and reliable choice for your home.