Features:- It can be oral nasal intubation training operations and teaching demonstration.- During oral, nasal intubation training operation, insert the correct operation of the airway, electronic display and play music function, so the lungs inflate gas.- Oral, nasal intubation training operation, the wrong operation insert the esophagus, electronic display and alarm function. Stomach gas expansion.- Error makes laryngoscope cause tooth pressure, electronic alarm function.- Observed and compared to normal side and the other side becomes large pupils.Specifications:Material: PVCVoltage: 220vPackage included:1 X Intubation model1 X Alarm machine1 X Power adapter