Leak Detector, LD3 Economy Refrigerant, Adjustable Sensitivity Level, 0.05 oz/yr R-134, 0.025 oz/yr R-22, For Use With All Halogenated Refrigerants Including R-1234yf and R-134a, Includes (4) AA Alkaline Batteries, (5) Replacement Sensor Filters, Leak Test Vial, Operator's Manual