The TIF XL-1A is a great choice for the economically minded technician. Features include, an all new ergonomic design with a rubber cushion grip on handle. Simple controls for easy operation. The advanced Digital Signal Processing, monitors the sensing tip up to 2000 times per second. Detects all halogenated refrigerants. Variable frequency audible alarm makes it easy to monitor leak rate. Flexible stainless steel probe with rubber liner for protection. Constant Power/Low Battery Indicator. Blow Molded carrying case, included. Certified to SAE J1627. Warranty 2 years. Ultimate Sensitivity< 0.4 oz. per year. Sensitivity Levels 1. Battery life Approx. 40 hrs.