A Home Security System designed to warn off burglaries; this may be a silent alarm that goes thru to the police or a loud alarm designed to draw attention to the house or office etc.

A Safe is a secure lockable box used in securing anything of value against theft or damage.

A Smoke Detector or smoke alarm is a device that detects smoke and issues an alarm to warn of a potential fire, enabling quick detection and escape if necessary.
All homes should have at least one smoke detector near any bedrooms; ideally, in a hallway, as well as in the bedroom itself.

A Motion Detector may be connected to a burglar alarm that is used to alert the home owner or security service after it detects motion.

CCTV is the use of video cameras to transmit a signal to a specific, limited set of monitors.

Security Lighting is often used as a preventative measure against intrusion or vandalism of property.
Used to aid in the detection of intruders, to deter intruders, or in some cases simply to increase the feeling of safety.
For security lighting tips: Lighting