Features: 1. Eco-friendly universal air conditioning system refrigerant compatibility is extensive.2. Suitable for leak detection of most compressed air air conditioning refrigeration systems.3. Easy to use, pollution-free and environmentally friendly.4. Fluorescent lamp oil with a fluorescent flashlight makes it easier to check for leaks.5. For car leak detection, oil/power steering/fuel/automatic transmission/coolant/hydraulics. Specification: Capacity: about 60g Color: as shown Instruction: 1. Use the same method as refrigerant oil, add low pressure of the filling port and turn on the air conditioning switch (double air box vehicles need to turn on the air conditioner switch (front and rear). 2. Fluorescent leakage agent can form a loop in every part of the refrigerant pipe. 3. system air conditioning works for 10 minutes.4. Wear protective fluorescent glasses and use a small flashlight with ultraviolet light to perform a detailed inspection. If there is a fluorescent effect, it means that there are leaks and the parts need to be repaired/replaced