Refrigerant gas leak detector. Long battery and sensor life. Adjustable tick rate system. Immediate response to less than 0.1 oz/yr R134a leak rate. Adjustable tick rate allows leak location in contaminated areas. Detects CFC's, HCFC's and HFC's, SF6, nitrous oxide and halon. Size: 3.5 x 10 x 1.6 inches. Weight: 1.3 lbs. Construction: high impact ABS. Battery power: 3 "C" alkaline batteries.