Style:Adult Material: PVC Voltage: 110V Size:53*33*26cm/20.8*12.9*10.2inch Weight:3400g 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.