We offer finger tip oximeter color display, which is used to measure human hemoglobin saturation and heart beat through finger. Widely used in family, hospital (including clinical use in internist surgery, anesthesia, paediatrics, intensive care and etc) oxygen bar, social medical organization, physical care in sports and others. Features: high quality 65k color oled display automatic power-off without signal for 5 seconds superior accuracy and durability two "aaa" alkali battery and oled bar graph two display direction adjustable