PRO-Alert IR Infrared Electronic Refrigerant Leak Detector Utilizes state-of-the-art infrared sensor technology. Meets SAE J2791 and J2913 performance standards. Sensitive to R-12, R-134a, R-1234yf and other refrigerantsOptimum sensitivity detects leaks down to 0.1 ozyear (3 gyear)User selectable, three-position sensitivity switch minimizes false triggering and allows for easy diagnosis of small, medium and large leaksInfrared sensor provides consistent response and cannot be poisoned by exposure to large amounts of refrigerants. Extremely long service life of 1, 000 hours or more!High-efficiency air sampling pump provides quicker response and quicker clearing (zeroing)Audible alarm and multiple LEDs help locate leaks fastNiMH battery provides over six hours of use between charges. Detector also works with AC and DC power adapters (included)On-board diagnostics indicate charging status and alert user to low battery or infrared sensor failureRubber-coated, flexible metal probe holds its position in tight spacesIncludes sensor, replacement filters, rechargeable NiMH battery, AC power adapter, DC power adapter with cigarette lighter plug and rugged carrying case. AC adapter available in 120V, 230V, 240V and 100V versions.Comes with complete two-year warrantyCompatible with R1234yf systems