Refrigerant Freon Leak Detector with Indicator light, High Accuracy and Instant Halogen Gas Leakage Tester for HFCs CFCs CFCs Halogen R134a R410a R22a Air Condition HVAC [Widely Use & Portable]: Test 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 Accuracy&Stable]: High accuracy gas tester, shows you exactly where the leak is. 7 degree munual adjustable sensitity also with automatically adjustment to the optimum detecting state; Built-in voltage, ultra-low power IC design, making yosoo freon detector more stable [Only Few Seconds You Will Find Leak]: No need dye, just batteries in turn , and turned it on, Stared checking lines, Bamb, Yosoo halogen gas detectors will tell you where the leak is, it took less than a minute to find [Beeping and Light Flash Warning]: You will never miss any leak [What You Get]: Yosoo refrigerant freon leak detector(no battery included) , Yosoo worry free guarantee and friendly customer service