JAVAC are one of world's leading manufacturers of refrigeration and vacuum equipment. Headquartered in Melbourne Australia . The Compass Refrigerant Leak Detector features a patented heated diode sensor, specifically designed for residential and commercial Air Conditioning leak detection application. The Compass provides the optimal balance of features, function and value. This easy-to-use hand-held refrigerant leak detector delivers excellent sensitivity to all refrigerants, up to 0.15 oz/year. Unlike some other leak detectors available on the market, this clever unit can pinpoint the leak source quickly through the high/low sensitivity adjustment; LED’s illuminate progressively to convey leak size and a water-resistant filter protects the sensor from jobsite contaminants such as dust, dirt and oil. Features: Sensitivity 0.15 oz/year Detects all CFCs, HCFCs, HFCs, and HFOs No false alarms from soap solutions Runs on rechargeable battery or AC adapter Patented heated diode sensor provides excellent sensitivity High/low sensitivity adjustment allows you to decrease sensitivity to pinpoint leak source Automatic background adjustment compensates for refrigerant build-up LEDs illuminate progressively to show leak size Water-resistant filter protects the sensor from moisture and contaminants Easy one-button operation Headphone jack (headphones sold separately) Specifications: Compatible refrigerants R22, R32, R134a, R404a, R407c, R410a, R422b, R448a, R449a, R452a, R452b, R507 , R1234yf and more Operating Temperature -20 to 50 °C Minimum sensitivity 0.15 oz/year (4 g/a) Power source NiMH battery or AC adapter Low Battery Alarm Battery life 5.5 hours Dimensions: 44 x 34 x 12 cm Weight with batteries 1.15 lb. (0.522 kg) Probe length 15 in. (38 cm) Certifications: CE and EMC Base unit includes Sensor, NiMH battery, spare filters, wall charger, 12 V car charger, hard plastic carrying case Warranty 1 year replacement