The Pulse Oximeter Fingertip Oxygen Saturation Monitor by Pulse is a compact and easy-to-use device designed to measure the oxygen saturation levels in your blood. This digital oximeter is powered by batteries and features a sleek black design, making it convenient for on-the-go monitoring. The model jks50bl comes as a single unit, perfect for personal use or for monitoring patients in a healthcare setting. Its fingertip design allows for quick and accurate readings, making it a reliable tool for ensuring optimal oxygen levels.