This phone accessory spots hidden cameras in 5 seconds — SweepLED prototype uses LED reflections and could cost only $7

SweepLED.

• SweepLED can spot hidden cameras by varying its illumination
• AI can detect camera lenses by the light that gets reflected back
• The accessory fits on the back of a camera and works in seconds

Unless you're in the safety of your own home, there's always a worry that you're being surveilled without your knowledge — when you're in an Airbnb, hotel room, changing room, or restroom, for example. Now researchers have developed an LED-powered phone accessory to give you some extra peace of mind.