Carried Standard AHA (American Heart Association) 2005 guideline for CPR and ECC features 1.Simulation standard open airway display 2. artificial hand chest compressions alarm: (1)indicator light display (2)sound prompting (3) Digital counter display intensity display of correct (1-2 cm) and wrong (<1 cm or >2 cm) compression; alarm of wrong compression 3. Artificial respiration (inhalation): display device and alarm device . Inhalation <30 ml or > 50 ml, wrong indicator light display and alarm prompting; Inhalation between 30-50 ml right indicator light display; 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.working conditions:110 v-240 v