ABUS Mechanical 787 SMART-BT KeyGarage™ with ShackleABUS 797 SMART BT KeyGarage with Shackle. It holds up to 20 keys, three car keys or up to 30 plastic cards on a temporary and flexible basis for various groups of people. Inside there are two hooks for keys. As an admin, you can generate a six digit key code for others in the app, which will give them access to whatever is stored in the smart KeyGarage without the use of a smartphone; e. g. for guests in a holiday rental, workers, cleaning service,