ACCURATE, FAST AND RELIABLE - CMS 50 DL Pulse Oximeter accurately determines your SpO2 in less than 8 secondsSPORT/HEALTH ENTHUSIASTS - For aviators, sporting enthusiasts, skiers, bikers or high altitude climbing, the CMS 50 DL is a RELIABLE companion for quick and easy readings for oxygen saturation.THE ORIGINAL STANDARD - Setting the original standard for reliable and consistent pulse oximetry, the CMS 50 DL is manufactured and backed by an ironclad 12 month warranty.PACKED WITH ACCESSORIES - Includes 2X AAA batteries that enables use out of the box, a pulse oximeter case to protect the device whe not in use, and a LANYARD for cconvenience as either a wrist strap or to be worn around the neck.