Digital signal micro processor Mute function Visual leak level indicator Reset function Keypad control Sensitivity level adjustment Battery test function Variable frequency audible alarm Ultra bright UV/blue led light 6 Levels of Sensitivity (15 Levels of Detection) Detects leaks as small as 1/10 oz per year Detects all refrigerants (CFC’s, HCFC’s, HFC’s) Meets and exceeds SAE J1627 Power: 2 “C” Batteries Probe: Flexible 16” (43 cm) Packed in a blow molded case with UV glasses, (2) "C" batteries and sensor tip