[Widely Portable] Tests all halogen gases including chlorine, fluorine, bromine. Such as CFCs R12, R11 R500 R503; HCFCs R22, R123, R124, R502; HFCs R134a R404a R125 etc... Still can detect other compounds such as AZ-50, HP62, MP39 with carrying case [High-precision and stable] High-precision gas tester, which accurately displays the leak location. 7 degrees of independent adjustable sensitivity, automatically adjusted to the best detection state; built-in voltage, ultra-low power IC design, makingthe freon detector more stable Find leaks in secondsNo staining required, just batteries, then turn on, stare at the inspection line, the halogen gas detector will tell you where the leak is, find it in less than a minute [Beep and Flash Warning] You wont miss a leak [What You Get] Refrigerant Freon Leak Detector (without battery) scope Working temperature: 052 Maximum sensitivity: 6gr/yr (halogen refrigerant) Battery life: about 50 hours of normal use Square: no cover Probe length: 20cm Feet Inches: 22.9 cm x 6.5 cm x 6.5 cm Warm-up time: about 6 seconds Reset time: 2-10 seconds Power: 6v DC, 4 x batteries (not included)