MD300W11 is a small, compact device intended for wrist use in measuring functional oxygen saturation and pulse rate. It may be used for acquainting users with their oxygen saturation and pulse rate rapidly and learn their health. It not only has high-resolution and non-volatile memory but also can accurately track tiny changes in one second. MD300W11 is specially designed for sports. Accurate Measurement Professional Guarantee 1. Lightweight and easy operation; 2. Effective and affordable wrist pulse oximeter; 3. Accurately measure SpO2 and heart rate; 4. 10 patients ID can be storaged; 5. Ideal for spot-checking during mountain climbing, light jogging and speed walking; Innovational Design Exhibit Quality 1. Comfortable wrist continuous measuring and spot check with memory capacity; 2. Minimal maintenance - ideal for Sports usage; 3. Robust and attractive design; 4. Transmit data by the data cable;