3d
alarm
area
attention
building
camera
caution
cctv
circuit
control
crime
danger
digital
electronic
equipment
graphic
guard
icon
illustration
lens
looking
monitor
monitoring
observe
outdoor
police
privacy
private
property
protect
protection
record
rendering
safe
safety
secure
security
sign
silhouette
spy
street
surveillance
symbol
system
technology
television
video
warning
watching
zone