This is a rather net version of the classic device used for locating hidden cameras in accommodation or other locations.
It relies on retro-reflection from optical systems to show their location and allow further investigation.
Dave Frederick
2024-01-05 02:45:55 +0000 UTCBig Clive
2024-01-03 15:38:30 +0000 UTCJim Hewlett
2024-01-03 14:01:50 +0000 UTC