Experience cutting- with the Smart Ring. Crafted from aluminum alloy, this ring offers durability and a sleek design. It's equipped with advanced health monitoring features to keep track of your wellness. Enjoy the freedom of wearing your smart ring anywhere thanks to its 5ATM waterproof ratings, making it suitable for sports and weather conditions. The multi-sport modes allow you to tailor its functions to suit your active lifestyle. 24-hour health monitoring to protect . Smart ring, with high strength and design, brings long-lasting comfort and non-sensory technology experience to the fingertips, so that smart wear can easily integrate into every moment of life. Circumference 54.4mm, diameter 17.4mm Battery capacity: 200mah Due to different batches, there may be differences in product appearance and printed text, which will not affect use. Colour:Black Material:Aluminum alloy Package Contents: 1 * Smart Ring kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.