High accuracy real-time measurement indication, good assistant for doctors and nurses. Focus on your SP02, Take care of your health. HD large screen and unique soft silicon housing provide clear and comfortable measurement. With a vastly improved LED and sensor, it allows Sp02 (Blood Oxygen Saturation level) and pulse rate measurement even at low blood perfusion. With ALARM function will remind patients of Sp02 and PR value change.lt can be used in monitoring therapeutic effects. SUITABLE FOR ALL AGES � Finger chamber with SMART Spring System.