Simulate standard airway opening. When performing chest compressions with the manual hand: The dynamic barcode indicator light shows the pressing depth: the green light indicates that the depth is correct, the yellow light indicates that the depth is not enough, and the red light indicates that the force is too deep; Contains a digital counting display and voice prompts. During ar... https://www.cqscopelab.com/sc-cpr280-multifunctional-electronic-cpr-simulator