Features: This product is a professional leak detection tool designed to be used with fluorescent dye. After evacuating the system, add an appropriate amount of fluorescent dye into the air conditioning system to mix with the refrigerant oil. Once the system is charged and operational, any refrigerant leak will carry the fluorescent dye to the leak point. When illuminated with the included blue light flashlight, the dye emits a bright golden yellow glow, making leaks easy to identify. The flashlight features a strong beam, durable aluminum alloy casing, and is designed for easy operation. It is non-corrosive, waterproof, rust-resistant, and built for long-term use. Enables quick and accurate leak detection in various air conditioning and refrigeration systems. Notice: Add the fluorescent dye to the compressor and inspect the system using the flashlight. For automotive systems, one bottle of dye is typically sufficient. Larger systems such as home or commercial AC units may require additional dye. Specifications: Flashlight Color: Random Product Name: Fluorescence Leak Detector No fluorescence visible or very faint glow indicates: 1. No leak in the system 2. Insufficient amount of fluorescent dye used Package Includes: 1 x Pair of Glasses 3 x Batteries 1 x Bottle of Fluorescent Oil 1 x Flashlight