The Mobeye call key is a user-friendly and secure remote switch for entrance doors, gates and for situations where access rights change regularly. An authorized call opens electronic closing plates or door controls. No costs are incurred for the caller.The granting of access rights is simple. The rights are assigned in the secure and clear Mobeye portal, unlimited or for certain time windows (period, day, time). The Mobeye call key automatically retrieves these rights and stores them locally. Due to communication via the internal 4G module and the Mobeye SIM card, on-site no Internet or WLAN is required. The MCK400 works with all electronic locks and locking plates, which react to a pulse or switching command. A protocol in the portal indicates who used the door control and when.The Mobeye call key has two relay outputs for opening a lock. These are bi-stable relays, which can switch a maximum of 30V/1A. Output 1 switches after an incoming call or SMS command. Output 2 switches per def