Smart bracelet tattoos are not allowed.

Yes In the official instructions for use of the smart bracelet, low blood perfusion, excessive hair on the arm, tattoos, dark skin color, drooping arm, shaking arm and low temperature will all lead to inaccurate bracelet test. A smart bracelet is a wearable smart device. After wearing the smart bracelet, users can record real-time data such as exercise, diet and sleep in daily life through the bracelet.