alarm
alert
apartment
background
black
blue
burglar
control
crime
danger
detector
detectors
distance
electronic
emergency
equipment
escape
home
house
indoor
indoors
infrared
intruder
light
modern
monitoring
movement
object
office
prevention
privacy
protection
red
risk
room
security
sensor
set
signal
siren
smoke
sound
system
technology
threat
warning
white