The 8500 Digital Handheld Pulse Oximeter provides a simple universal tool for patient monitoring – from spot checks to continuous monitoring. The versatility of the Nonin 8500 makes it the preferred choice for doctor’s offices, clinics, and hospitals throughout the world. The 8500 series has set the standard for durability and performance. Another reason so many practices and clinics rely on the 8500 is versatility, making it a cost-effective choice. One unit can handle all patients from infants to adults.