Coach 2 makes incentive spirometry easier for patients and clinicians alike. The one-way valve ensures patients inhale, rather than exhale into the unit. Highly-visible pistons and universal graphics (indicating correct inspiratory flow rate) help patients perform and monitor their own post-surgical breathing exercises without direct supervision. Other features include an O2 connection for supplemental oxygen, convenient handle, flexible popple tubing and bed rail holder. Individual or box of 12.