- Wide compatibility: The halogen detector tests all halogenated refrigerants and is suitable for leaks in air conditioners, refrigeration units, and other equipment using Freon or similar refrigerants. It helps identify leaks quickly to maintain system efficiency. - Seven adjustable sensitivity levels: Provides 7 sensitivity settings for precise leak detection, with a maximum sensitivity of 0.21 oz/year. Real-time auto-adjustment adapts to low to high concentrations across different applications, including automotive A/Cs. - Visual and audible alarms: Combines sound and light alerts for easy detection. On power up, it emits 2 beeps per second, increasing to 10 beeps per second when a leak is detected. The LED flashes more rapidly with a leak, and a green LED indicates normal battery status for continuous operation. - Reliable detection and reach: 6 seconds preheat time and 3 seconds response time for fast, dependable leak detection. A 7.9 inch flexible probe reaches tight or hard-to-access areas for accurate results. - Practical use scenarios: Automotive air conditioning service, home or commercial HVAC maintenance, and refrigeration equipment checks in kitchens, grocery stores, and warehouses.