Feature: 1 CE marked, with one-way valve, with plastic case 2 Unique design, high quality, high efficiency 3 CPR pocket mask with O2O inlet.It can make patient breath fluently. 4 Avoid direct contact between patient and rescuer 5 Soft cushion offers secure seal 6 Convenient to use with operate instruction Function: 1 Mouthto mouth face mask with one-way valve to avoid any direct contactbetween the patient and rescuer on mouth, nose and face , and helpovercome hesitation to start resuscitation 2 Transparent dome allows rescuer to visually check for patient's lip colour and vomitus 3 Oxygen inlet facilitates increased oxygen delivery to patient, standard connection 22mm Usage: 1 CPR resuscitator used to safely deliver rescue breaths during a cardiac arrest or respiratory arrest 2 CPR resuscitator is a small devece that can be carried on one\'s person. Air is administered to the patient when the emergency responder exhales through a one-way valve Specification: Type: First-aid device Valve Type: One-way valve Function: Breathing Apparatus Material: Plastic+Silicone Size: As the picture shown Package Includes: 1PC*Resuscitation Face Mask Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.