Freon leak detectors trigger on R22, R134A, R404a, R410A, and all halogenated refrigerants, including HFC, CFC, HCFC, and mixtures. Features ble and visual gas leak indication with dual battery indicator. Reacts to all halogenated refrigerants. After rotating the switch, the detector is ready for use. Selectable sensitivity levels from 1 to 7. Response time: 3 seconds. Operating temperature: 0°C to 52°C (30°F to 125°F). Highest sensitivity to halogenated refrigerants: 0.21 oz/yr. Battery life: approximately 50 hours under normal use. Operation mode: continuous and unlimited. Fixed probe length: 7.87 inches. Dimensions: 1.37 x 1.37 x 5.90 inches. Warm-up time: approximately 6 seconds. Reset time: 2 to 10 seconds. Power supply: 6V DC, 4 AAA alkaline batteries (not included). The unit includes a UV lamp and white flashlight. The UV lamp is used with fluorescent dye, and the white light helps illuminate dark or confined areas. LED light powered by internal battery. Color: Black and Yellow. Material: ABS. Package includes: 1 x Halogen leak detector. No other items included. Note: Lighting and display settings may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3 cm.