XS4 Electronical Escutcheons has clutch, 2 handles, Inside cylinder cut out and with BLE MIFARE/DESFire ID technology is a revolutionary stand-alone narrow body escutcheons thanks largely to the level of technology packed inside that brings together the convenience of an offline point - easy installation and no wires with virtually the same kind of power and performance of an online point. This version is compatible with most European mortise locks and cylinders with an offline point -- easy installation and no wires with virtually the same kind of power and performance of an online point. Its top quality stainless steel construction and Mifare-DESFire and BLE (Bluetooth Low Energy) technologies allow it to work with conventional smartcards and/or via SALTOs JustIN Mobile app. The SALTO XS4 One is the evolution of the Original model with a built-in, totally new reader available in two colors. This version is compatible with most European mortise locks and cylinders. The XS4 ONE's easy-to-install design makes it simple for security professionals to upgrade security and replace mechanical-key-operated door locks with the latest electronic access control solution suitable for a wide range of customer applications.