![Amazon.com: Smart Ring, Waterproof Ceramic Ring, Universal Wearable BT Connection Health Tracker for Mobile Phone, Sports Ring with Heart Rate Monitor, Sleep Monitor, Temperature, Blood Oxygen (Black No. 19) : Everything Else Amazon.com: Smart Ring, Waterproof Ceramic Ring, Universal Wearable BT Connection Health Tracker for Mobile Phone, Sports Ring with Heart Rate Monitor, Sleep Monitor, Temperature, Blood Oxygen (Black No. 19) : Everything Else](https://m.media-amazon.com/images/I/51TZNFbpilL.jpg)
Amazon.com: Smart Ring, Waterproof Ceramic Ring, Universal Wearable BT Connection Health Tracker for Mobile Phone, Sports Ring with Heart Rate Monitor, Sleep Monitor, Temperature, Blood Oxygen (Black No. 19) : Everything Else
![Smart Rings Market Size to Grow by USD 27.69 Million; The Multiple Applications of Smart Rings to Drive Growth - Technavio Smart Rings Market Size to Grow by USD 27.69 Million; The Multiple Applications of Smart Rings to Drive Growth - Technavio](https://mma.prnewswire.com/media/1917304/Technavio_Global_Smart_Rings_Market_2022.jpg?p=facebook)
Smart Rings Market Size to Grow by USD 27.69 Million; The Multiple Applications of Smart Rings to Drive Growth - Technavio
![found on a field in southern Bosnia and Herzegovina. Circle like shape. Looks like it was housing some sort of mechanism at one point. Made of metal, that is greenish. : r/whatisthisthing found on a field in southern Bosnia and Herzegovina. Circle like shape. Looks like it was housing some sort of mechanism at one point. Made of metal, that is greenish. : r/whatisthisthing](https://preview.redd.it/found-on-a-field-in-southern-bosnia-and-herzegovina-circle-v0-dz70iyyonkwb1.jpg?width=640&crop=smart&auto=webp&s=b7f57b946a126e9f2625975789bd771e9700ae29)