The #key is an object symbolic of opening & closing powers. It represents knowledge, mystery, initiation, & curiosity.
A Bells only alarm offers a sound system that will provide your home with a security alarm that will make a loud noise when it's set off. The alarm will make you aware about intruders in your home and warn your neighbours that your home security has been breached. This alarm won't send any information to the police, but instead alert it's surroundings and is able to send you a message on the phone if triggered.
There is also the monitored alarm system, which have people sitting in a surveillance centre 24/7 monitoring if any alarms are set off in your home. This means that you have people ready around the clock to inform your local police station that something has triggered the alarm in your house....