The circuit includes Smart-Filter, tubing, handset, mouthpiece, nebulizer kit and 22 mm x 20 mm adapter

Each circuit is intended for use by a single patient and is intended for 30 days of treatment or a maximum of 90 treatment sessions.

The system keeps a record of the number of cycles of use of the circuit.  If a circuit is used beyond its recommended life, the system will warn the user and stop operating.  Replace the circuit to continue the therapy