Features visual leak-size indicators, variable frequency audible alarm, flexible stainless steel probe with PTFE resin liner and constant power / low battery indicator. Advanced Digital Signal Processing—monitor the sensing tip up to 2000 times per second. Seven sensitivity levels. XP-1A Refrigerant Leak Detector measures 10-1/4" x 2-3/4" x 2-1/4". Weighs 1.2 lb. 14"L probe.