Access control and alarm monitoring systems; [ Alarm monitoring systems; Alarm monitoring systems; Camcorders; Cameras; ] Electric door bells; [ Electro-dynamic apparatus for the remote control of signals; Global positioning system (GPS); Signal bells; Smartglasses; Smartphones; Smartwatches; ] Video-telephones; [ Video baby monitors; ] Video screens [ ; Wearable activity trackers; Access control and alarm monitoring systems; Electronic readers and controllers for controlling access to a prem...