Combustible Gas Detector Detects Combustible Gases Refrigerant Gases Audible Visual Indicator Features Automatic Sensitivity Flashing Probe Tip Low Battery Indicator and Interchangeable Sensors Intrinsically Safe for Use In Class 1 Division 1 Group D Locations Battery AA Includes Batteries Color-Coded Probe Tips Hard Carrying Case Instructions Refrigerant and Combustible Gas Sensors Manufacturers Warranty Length 1 yr