1. Material: Plastic 2.Color: Transparent 3.Size: 15*14*8CM 4.Use directions: a. Connect the tube with the exerciser. b. Hold the exerciser in an upright position. c. Exhale and place your lips tightly around the mouthpiece at the end of the tube. d. Inhale deeply.Raise the ball in the first chamber. e. Enhance your breath.Raise the ball in the second chamber. f. Continue to enhance your breath. Raise the ball in the third chamber and hold it for 3-5 sec. g. Remove the mouthpiece and exhale slowly. REPET-after exercising,take a rest and breathe normally.This exercise can be repeated in accordance with the instructions of the doctor.Clean and sterilize(with steam sterilizer) the device before and after each use.