This electric hinge is a reliable solution for controlling the opening and closing of doors. It is manufactured by Security Door Controls and has a model number of PTH-4. The hinge is designed for use in commercial doors and door hardware, and is made of high-quality materials to ensure long-lasting durability. The SDC PTH-4 Electric Power Transfer Hinge SZ-PTH4QADI is easy to install and operates smoothly. It is perfect for use in businesses and industrial settings where there is a need for efficient and reliable door control. Whether you are renovating your space or upgrading your security features, this electric hinge is a great choice.