Inhale and exhale through this adjustable lung exercising device, just a few minutes a day, and in just 4 weeks you may find yourself breathing better. Can improve dyspnea, peak cough flow, speech and swallowing performance, and more. Easy to use, no electronics or batteries. Food-Grade Plastic; hand wash or place mouthpiece in dishwasher. ¾" H x 1¼" W x 4" L.