Detects all types of refrigerants, including CFCs, HCFCs, HFCs, and blends. Sensitivity levels can be adjusted from 1 to 5 using the + or - button. Equipped with an inner precise IC and ultra-low consumption circuit design for stability and extended battery life. Provides audible and visual display alarms for easy leak detection. Instantaneous response time with a warm-up period of approximately 6 seconds. This leak detector is designed for a wide range of applications, including detecting leaks in refrigeration systems, high voltage , and hospital equipment. It can also identify gases in fire-extinguishing systems and cleaning agents used in dry cleaning. With a maximum sensitivity of 6 /yr for all halogenated refrigerants, it operates effectively in temperatures ranging from 0C to 52C (30F to 125F). Color: As Shown Material: Plastic+Metal Package Contents: 1*For Intelligent Leak Detector(Without 4*AAA batteries) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.