Smart bracelet is a wearable smart device, which is easy to carry and worn on the wrist like a watch, which is different from the watch commonly known as bracelet. The smart bracelet is as big as the watch we usually wear. This function is very practical. Nowadays, many people suffer from acute sudden death because of the excessive pressure of life and the heart rate that we can't perceive. Both young people and the elderly at home can monitor their heart rate with a sports bracelet, and then the self-adjusting smart bracelet is sought after by many people. The performance of smart bracelets needs to be tested before they can be circulated in the market. As a test module of connection function, bladepin elastic microneedle module has stable and reliable performance.