How are the 3 LEDs powered? Also, does “no tools required” mean these snap over the existing covers? Otherwise you’d need at least a screwdriver, right?
The ones I have seen use clips on the back that make contact with the terminals on the the outlets and draw power for the LEDs
You would at least need a screwdriver to install these.
What color are they, White or Ivory?
Could they be a fire hazard ???