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Do not base your order on the picture presented.
Features of the Portex Coach 2 Incentive Spirometer:
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 flowrate) 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 bedrail holder.