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 WristOx2 sensors are designed exclusively for use with WristOx2 3150 oximeters Applications include overnight oximetry studies at home, in the hospital, and in sleep labs Two 1.5V alkaline AAA batteries 3 extra wristbands Carrying Case Dependable design and construction 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