*Perfect smooth-running without hearable noise thanks to the encoded technology. *Reliable permanent use, equipped with built-in backup battery (Optional). *Push & go function makes life safer and easier (Optional). *Spring closer on power failure, suitable for fire doors (Optional). *Articulated arm and sliding arm both available, can be mounted on the hinge side and opposite hinge side *Versatile functions available at any places, support access control system, fire/burglar alarm system building intercom system *Excellent reliability, passed more than 2 million cycle durability tests *Fully adjustable operating parameters to suit specific applications. Numerous control options *Optimum adaptability to individual requirements- e.g. residential lifts, hospitals, office buildings, retail outlets, department stores, stations and airports, shops and restaurants, homes with elder or disabled people