Double swing automatic door operator 2-direction swing, swing in and swing out as the same direction pedestrian goes by perfect smooth-running without evident noise thanks to the encoded technology excellent reliability, passed more than 2 million times durability tests clear and beautiful concealed installation, fixed inside the lintel built-in control panel with mini in-hand control operator ideal for all the swing doors with pivot bearing, including non-frame glass doors 1pc/color box, 4pcs/ctn