The Half Body CPR Training Manikin is designed to provide CPR operation practice tp medical students with a realistic experience. It features a simulated standard airway opening and allows for external breast compression with the correct compression intensity (5-6cm). The manikin indicates the correct compression position with a yellow light, correct compression depth with a green light and buzz prompting, and excessive compression with a red light and alarm buzz. For artificial respiration practice, students can observe the chest waveform to judge inhalation volume. The manikin operates in training mode and is powered by batteries.