Visit us: https://alvital.leadtek.com/index_eng.html Leadtek Fingertip Pulse Oximeter provides an accurate measurement of arterial oxygen saturation (SpO2) and heart rate (pulse) in seconds. Its versatile housing design can accommodate the widest size range of fingers between 0.8cm and 2.3cm (0.3 inch ~ 0.9 inch). Combined with the latest electronics technology, Leadtek Fingertip Pulse Oximeter is presented with the most friendly interface to users and environments. Key Features: 1. Lightweight and easy to carry 2. Automatic switch on/off 3. Powered by only 1 AAA battery, 18+ hours of continuous use 4. ...