| Clue | Source | Date |
|---|---|---|
| It might catch a thief or a speeder | New York Times | 07 Jun 2021 |
| Common security device ... or a feature of 20-, 33- or 38-Across | New York Times | 06 Feb 2017 |
| Device found in this puzzle's three other longest answers | LA Times Daily | 19 Jan 2017 |
| Common security device ... or a feature of 20-, 33- or 38-Across | ||
| Surveillance device | ||
| Surveillance device found in 19-, 31- and 39-Across | ||
| Surveillance device found in 19-, 31- and 39-Across | ||
| Allen Funt device |