Infrared Refrigerant Leak Detector - The ergonomic design fits naturally in your hand. The ruggedized construction stands up to abuse most other leak detectors can't handle. The eight-hour battery life lets you work all day before recharging and the included vehicle and wall chargers help you during overtime. The mute and peak functions allow you to work the way you want to work. The magnetic hanger helps keep the detector out of the way when repairing a leak, but visible enough so you won't leave it on the job.