LotFancy Refrigerant Freon Leak Detector for HFC CFC Halogen R134a R410a R22a R600a R290 Air Condition HVAC Excellent sensor with maximum sensitivity of 6gr/yr, the Freon leak detector detects all kinds of halogen refrigerants including but not limited to R11, R12, R500, R503, R22, R123, R124, R502, R125, R134a, R404a R600a R290 Real time sensitivity, refrigerant Freon leak detector can be automatically adjusted to the best optimum detecting state Flexible probe can reach to almost any awkward corners or space; More stable gas leak detector with precise ultra-low power IC design Tricolor display of battery voltage; Siren sound and flashing light for the leak alarm indicator We offer 100% satisfaction guarantee and one year warranty