Features:
1. Simulate airway opening
2. Artificial mouth-to-mouth respiration (air blowing): You can see the chest rising and falling
3. Manual chest compression: Correct compression depth is 5-6cm
4. Operation cycle: 30 compressions and 2 artificial respirations, a total of five cycles of CPR operation of 30:2
5. Operation frequency: 100-120 times/minute
6. Operation method: training
7. Alarm function