This is the heart rate fingertip monitor that provides superior comfort and accurate readings. The fingertip monitor's gently flexing hinges provide optimal comfort on large or small fingers, unlike typical models that pinch uncomfortably. The unit displays readings on its high-definition color OLED display in seconds. The display changes to your preferred viewing orientation at the touch of a button, and it can also announce readings in a clear female voice. Also an oximeter, the device monitors oxygen saturation. Includes carrying case, lanyard, and two AAA batteries. 1 1/2" H x 1 1/2" W x 2 1/2" L. (2 1/2 oz.)