Tellegloww 2-in-1 AC Leak Detector Kit for R1234yf R134a R410a, Electronic Refrigerant Sniffer & UV Dye Injector Tool Set with UV Flashlight, 270pcs O-Rings, 39pcs Valve Cores for Auto & Home HVAC

This AC Leak Detector Kit is fantastic for anyone working on R1234yf, R134a, or R410a systems. The UV dye injector makes finding leaks quick and precise, and the low side quick coupler and mini split adapter are really convenient for all types of AC units. The included glasses and flashlight are a thoughtful touch that makes detection easier in tight or dark spaces. Setup is straightforward, and the kit feels durable and professional-grade. Whether you’re a DIYer or a technician, this kit simplifies finding leaks and saves a lot of time. Highly recommended! Pros: • Works with multiple refrigerants • UV dye makes leaks easy to spot • Durable, well-made components • Accessories like flashlight and glasses included Cons: • Requires basic familiarity with AC systems Overall, a complete and reliable kit for AC maintenance and leak detection.

This is a very complete kit. You use the aluminum cylinder to force oil/dye into your system, then use the flashlight to check for leaks. Has fittings for 1234YF (newer automotive refrigerant) as well as R134A, and even the older style fittings that you might find on an R12 system or home unit. Lots of o-rings in common sizes to fix leaks if you do find some as well as a great selection of valve cores. The sniffer seems to work, but I don't usually rely on them, so check other reviews. Both the flashlight and sniffer will need batteries before you use them.