1 Set Choking Rescue Device Adults Children Portable First Aid Choking Device First Aid Supplies Features:Patented non-invasive suction rescue device that saves lives in air-blocked emergencies. Beware of plagiarism!Ease of use: Designed to be easy to use. Quite simply, if you live alone, you can use it on yourself in a choking emergency.No Prescription Required: This kit is suitable for children and adults. The suction duration is minimal, so it is safe and effective.Never expires: No need to replace the device unless it is used to save the life of a choking victim. Only the masks need to be replaced every 2-3 years.Your purchase includes: one check valve, one child mask, one adult mask, one practice mask, and a set of instructions for use.Specification:100% Brand and NewSize:As pictures show(1 inch = 2.54cm)Color:As picturesMaterials:Plastic Package Included:1*Check valve1*Children's mask1*Adult mask1*Practice mask1* Instructions for use.Note:Please be aware that due to your computer monitor display the color may have some difference between the picture and the real item.There is 2-3% difference according to manual measurement.