Finger-clip Heart Rate Sensor with Shell from Seeed Studio is a miniaturized, low-cost, yet powerful optical heart rate sensor module. The integrated shell not only gives you more protection but also makes a better look of the sensor. Moreover, the shell allows the sensor to fit closer to the fingertip for better accuracy and clear signal transmission. The sensor can measure heart rate in real-time, with adequate accuracy and muscle movement interference immunity. It can detect PPG signals through the light emitted by the LED and reflected by the finger, and then convert them into heart rate data by using Seeed Studio's applied algorithms. The sensor has a long service life with LED up to 10,000 hours, and also an ultra low-power design that allows you to conveniently take readings with no additional power source.