alert
aluminum
attention
brightness
bronze
camera
camera surveillance
caution cctv
cctv
chrome
chromium
copper
crime
criminal
danger
gold
golden
hazard
high tech
hole
icon
label
looking
material
metal surface
monitored area
observe
perforated sheet
perforation
privacy
private
protection
protector
risk
safety
security
security guard
security system
shine
sign
stainless steel
sticker
surveillance
symbol
technology
texture
textured
theft
video surveillance symbol
watching