Fear to implement CPR in order to address concerns about health issues, attribution of responsibility for subsequent legal disputes, and concerns about improper operation and forgotten processes. RE Breath can improve oxygen supply without mouth to mouth using a mask and simple oxygen supply equipment. Provide voice guidance, unblocked respiratory tract, and chest compression alignment tools to make the rescue process smoother and improve the recovery rate. During the implementation of CPR, the entire process of video recording and evidence storage is provided to provide protection for the rescuers.