The Mastercool 56400 Raptor Refrigerant Leak Detector with UV Blue Light offers state-of-the-art features and micro-processing technology while the design sensor delivers an accurate and instantaneous response. An ultra bright UV light is built into the end of the probe allowing for both electronic and UV leak detection of even the toughest leaks. Packaged in a blow molded case with UV glasses, 2 "C" batteries and sensor tip. In addition to that, the 56400 leak detection kit contains a refillable dye injector, dye injector connection hose with a R12 Adapter, 2 oz. bottle of concentrated universal dye, UV safety glasses and dye cleaner.