Microprocessor controlled with advances digital signal processing detects over 6 different refrigerant gases snake tube length is 15-Inch Operating temp 32 to 104-Degree Fahrenheit High-low leak sensitivity selector Buzzer and tri-color LED indicators Kit includes 4 "AA" batteries, leak check, molded hard case General Tools RLD380L Hand-Held High Performance Refridgeration Leak Detector is the perfect tool for maintaining any air-condition or cooling system utilizing a compressor and refrigerant. Unit features a newly developed Microprocessor Controlled sensor with advanced DSP which is extremely sensitive to the full variety of halogenated refrigerants. Automatic Ambient Reset function sets the unit to ignore ambient concentrations of refrigerant. The unit includes a High-Low Leak Sensitivity Selector and features an Audible Alert along with a Multi-Color Visual Display to indicate adverse conditions.
It arrived today. AA batteries (4) corroded in their shipping wrappers. The enclosed calibration certification is dated 2008. I have yet to install batteries. I think it best to return this obvious old stock salvage item.