04 Ago Safety Siren Pro4 Plug-in Radon Detector, Continuous Radon Gas Monitoring With
Alarm System: Dual Audio-Visual Alert System for instant radon warnings. Alarm: Audible. Alarm Threshold: Default at 4.0 pCi/L (user adjustable). Sensor Type: Photoelectric. KEY FEATURES. Country of Origin: Proudly engineered and manufactured in the USA....