Widely compatible with halogenated refrigerants Works with R11, R22, R134A, R404A, R410A, R1234yf, SF6 (HFCs, CFCs, HCFCs and blends). Suitable for nearly all airconditioning and refrigeration applications, including car airconditioning, household HVAC systems, and equipment refrigeration. Fast warmup and quick detection Instant response: warmup in 6 seconds and a response time of 3 seconds. On startup, the detector relaxes into its detection state within 6 seconds. Hold the sensing tip near an area you suspect is leaking and switch on to locate higher concentrations quickly. Audible and visual leak indication When leakage is detected, an audible 'di di' sound is heard. The heavier the leakage, the faster the sound, and the indicator light flashes more rapidly. sensitivity with versatile probe Advanced IC circuit design provides sensitivity (0.2 oz/year). Seven adjustable sensitivity levels. Flexible probe reaches into tight or awkward spaces and corners. Automatically adapts to changing refrigerant concentrations. Power and operating requirements Requires 4 x AAA alkaline batteries (not included). 23 practical use scenarios Automotive airconditioning service: locate refrigerant leaks in car A/C systems quickly without dismantling components. Residential HVAC inspection: identify leaks in home airconditioning or heat pump units to plan repairs or recharge needs. Commercial refrigeration and equipment: detect leaks in larger refrigerant systems, ducts, or industrial chillers where access is limited. This product maintains a professional, reliable design for accurate leak detection across a wide range of halogenated refrigerants, with clear audible and visual alerts and flexible usability in tight spaces.