SmartHeart premium fingertip pulse oximeter is a convenient tool that allows you to spot-check blood oxygen saturation and pulse rates at home or on the go. Designed for children and adults, it accommodates a wide range of finger sizes. An automatic rotating display features four backlit modes, while an alarm alerts users when a digit is out of the device or if levels rise or fall to a previously-determined setting. A PC link connection allows for real-time monitoring and data storage and review. Its automatic shut-off keeps the battery from being drained when the oximeter is not in use. It comes with everything you need to get started: pulse oximeter, USB cable, software disc, storage case, lanyard, AAA batteries, and English/Spanish instructions.