1.Wide flow rate range from 600 to 1200 cc/sec
2.3 color-coded balls/3 chambers
3.Minimum flow imprinted on each chamber
4.Contents: PP mouthpiece, EVA connection tube, ball, plastic shell
5.Preformance:Improve lung function, and enhance the tolerance of patients to operation, reduce the postoperative complications, convenient to carry and operate, easy to exercise by patients selves.
