A/C Contanimated Recovery Low side hose with 1234YF coupler and black recovery hose included. 80% tank full shut off safety harness prevents overfilling recovery tank. Proprietary oil-less compressor is capable of handling both liquid and vapor refrigerant. Self-purge function effectively removes and remaining refrigerant for the machine. A high pressure shut-off switch turns the machine off automatically of the pressure rises above 435 PSI to protect the equipment. Inlet filter screen stops debris from getting inside of the machine. One year warranty 25700