David comes with our patented ball/valve airway which replicates the occluded airway of the victim in need of CPR, and opens to allow air to lungs when proper chin lifts are applied. Features include: personal use channel mouth/nosepieces for each student, lightweight, portable, lifelike anatomical landmarks, carotid pulse, sternum, ribcage, and substernal notch. Soft carry case with kneeling pads included.