Patent pending Heated Pentode Sensor technology: Refrigerant specific detection, Elimination of false alarms, Unaffected by rapid temperature change, Sensor can not be poisoned by excessive refrigerant. Detects ALL Halogenated refrigerants, including R-410A. True Mechanical Pump provides instant response and clearing. Tri-color visual leak size indication. Tactile keypad controls. Adjustable sensitivity and one touch reset. Mute feature silences audible alarm. Sensor status indication. Battery self test. 16 in. Flexible Stainless Probe. Ballistic Nylon carrying case and Battery Charger included.