Features: Featuring Nonin PureSAT® SpO2 technology, the WristOx2 3150 USB delivers fast, accurate oxygen saturation and pulse rate readings in challenging conditions, including low perfusion and motion The WristOx2 3150 USB is compatible with a wide range of Nonin PureLight® sensors and provides continuous, reliable SpO2 monitoring and data recording Applications include overnight oximetry studies at home, in the hospital, and in sleep labs Two 1.5V alkaline AAA batteries 1 wristband Product Specifications: Brand: WristOx2® Country of OrigiN: United States Alarm Type: Visual Application: Wrist Pulse Oximeter Connectivity: USB Cord Display Type: LCD Display Power Source: Battery Operated Sensor Type: 1 Adult Sensor Ring User: Adult