Your Purchase Includes:Two packs of LifeVac Each Complete with Patented One-way Valve, One Pediatric Mask, One Adult Mask, One Practice Mask, One Set of Instructions for using Worried About Choking?: LifeVac is the PATENTED, non-invasive rescue suction device that can a life in an airway obstruction emergency. Beware of copycats! Easy to Use:The LifeVac was designed to be easy to use. Easy enough that if you live alone, you can use LifeVac on yourself in a choking emergency. No Prescription Required:This kit covers children and adults. The duration of suction is minimal, so LifeVac is safe and effective. Never Expires:The LifeVac device will NOT have to be replaced unless used to the life of a choking victim. Only the masks will need to be replaced every 2-3 years. If used, fill out aLife Saved report for a replacement.