Waterproof Smart Watch BT Call Voice Assistant Heart Rate/Blood Oxygen/Sleep

1. Simple and convenient, with adjustable tightness and length at any time
2. The surface is vacuum electroplated, polished and brushed with a long-lasting, wear-resistant texture that does not fade
3. The breathable design is cool and comfortable
4. It is not easy to loosen even after long-term wearing
5. It is easy and convenient to put on and take off at will