Key-operated push-button with anti break-in. Wall mount. 2 microswitches for exchange. Max contact rating 16 A/250 V ac 0.1/24 V dc. (Mod XK 21 H) 0.1 A/24 V dc (Mod XK 21 L). Facility to electric brake release. Lever release. (cylinder lock not included). compatible with European cylinder. (max. length 45 mm)