Robinair (34288) CoolTech R-134A Recovery, Recycling, and Recharging Machine Simple operation + superior accuracy - it quickly recovers, recycles, evacuates, & recharges R-134a while meeting SAE J-2788 standards for accuracy, 95% refrigerant recovery, & charging to +/- 1/2 oz. A display reminds you to empty the graduated container to show the amount of oil to replace Eliminates damaging air without monitoring gauges or opening valves Maintains a user-selectable amount of refrigerant in an internal vessel and signals when its time to change supply tank, no monitoring required Multilingual Display - displays refrigerant use, monitors remaining filter life, and prompts appear when 1/3 of filter life remains