Ricca-Reddington Halide Hound HH400 Hvac Leak Detector

Description

Ricca-Reddington Halide Hound HH400 Hvac Leak Detector.
Condition is Used. Tested and seems to work. I turned it on and it squeals then starts to tick. Turned on some R-22 gas and it started to squeal.
Requires 4 AA batteries. Batteries not included.