The MEDIATOR linear door opener is a new development specifically for this lock solution. The linear door opener is motor-operated and meets all requirements for use in a busy apartment building., The front door is constantly locked day and night, The house can be left through the front door at any time despite the door being permanently locked, If visitors arrive late in the evening or early in the morning, the locked front door can be easily opened from the apartment, 65 MEDIATOR DOOR OPENER EST, 12 V GS SIIW 500X30X34MM DIN LEFT