Features 50 parts per million minimum detection Long 18 inch gooseneck Visual leak detection indicated by color LEDs Predetermined level detection with separate user adjustable alarms Precision sensor detects the most minute leaks LED Tip light in sensor cap lights up the suspected area Adjustable tick rate to locate leaks easily and quickly Fast response time of less than 2 seconds to 40 percent LEL Headphone jack 3 year limited warranty Specifications Power supply Four AA Alkaline batteries Sensitivity < 50 ppm Methane Sensor Solid state Warm-up Approximately one minute Response time < two seconds (to 40 percent LEL) Recovery time < four seconds (from 40 percent LEL) Duty cycle Continuous Battery life Approximately 12 hours (Alkaline) Probe length 18 Inches Operating environment 32 to +122 degrees F (0 to +50 degrees C) 10 to 90 percent RH Level indicators Audible: Adjustable tick with separate adjustable alarm Visual: Six LED’s ranging from green to red Partial List of Gasses Detected Acetone Alcohol Ammonia Butane Steam Gasoline Halon Hydrogen Sulfide Industrial Solvents Propane Lacquer Thinner Natural Gas (methane) Select Refrigerants Naptha Jet Fuel