Features: 1. Simulate standard open airway 2. External breast compression: display device and alarm device a. indicator light display of correct and wrong compression ; alarm of wrong compression b. intensity display of correct (2-3 cm) and wrong (<2cm or >3cm) compression; alarm of wrong compression 3. Artificial respiration (inhalation): display device and alarm device a. Inhalation <150-200ml or > 200ml, wrong indicator light display and alarm prompting; Inhalation between 150-200ml right indicator light display b. Inhalation too quickly or too much result in air entering into stomach; indicator light display and alarm prompting 4. Ratio of compression and artificial respiratory: 30:2 (one person) or 15:2 (two persons) 5. Operating cycle: one cycle includes five times of 30:2 or 15:2 ratio of compression and artificial respiration 6. Operation frequency: at least 100 times per minute 7. Operation methods: exercise operation 8. Examination of carotid response: pinch the pressure ball by hand and simulate carotid pulse 9. Working conditions: Input power is 110-240V PACKAGE SIZE: 80*30*40cm G.W.: 11.2KGS