10-Year Worry-Free Smoke&Carbon Monoxide Detector, Battery Powered, Voice Alarm

Hardwired Battery Backup Smoke Detector with Ionization Sensor

Zero bias Schottky detector Frequency .01-18 GHZ

Vintage Frigidaire SA-2136 Freon Leak Detector Circa 1937

Hardwired Replaceable Battery Backup Combination Smoke and Carbon Monoxide

Hardwired Interconnectable Smoke and Carbon Monoxide Detector

VINTAGE TESTLITE FUSE PULLER / Voltage Detector / IDEAL INDUSTRIES,CAT.# 34-012

Vintage c.1870's CHUBBS PATENT Detector Lock Key 44mm Made in London