UNIVERSALly REFRIGERANT COMPATIBILITY : Works with multiple refrigerants including R22, 32, and R134a, making it ideal for various cooling systems HIGHLY SENSITIVE LEAK DETECTIONs : Equipped with a precisions sensors, this refrigerant leak detector quickly locates leaks with accurate sensitivity up to 0.5oz/year for R22 Double ALARM SYSTEMs : Features sound and visual alerts that intensify with leak size, ensuring clear and immediate detections feedbacks BATTERY POWERED CONVENIENCE : Runs on a single 3.7V dry battery (not included) for instantly use, perfect for outdoor repairs and maintenance FLEXIBLE PROBE DESIGN : The bendable long probe easily accesses tight spaces in pipes and ducts for thorough leak inspection, Manufacturer: Hrtyvhin