JAKCOM-R3F EDAL Waterproof Smart Ring for High Speed NFC Electronics Phone with Android and wp Phones Small Magic Ring only the function as a

only the function as a reference) Blood oxygen &Heart rate

And it has 230W high power

4” LCD Display

98 oz Size: 248 x 173 x 8 mm / 9

self-test he measured are convenient

JAKCOM-R3F EDAL Waterproof Smart Ring for High Speed NFC Electronics Phone with Android and wp Phones Small Magic Ring only the function as aProduct Features: Products description The Jakcom smart ring is a Wearable electronic components, operate the mobile function and share the data by NFC wireless frequency communication technology. Features: Resistant to water and dust Compatible with Android WP Smartphones with NFC Lock Unlock your NFC devices Share information with other devices Control functions of your Smartphone Tablet , such as following: Private Note ,Screen lock ,APP lock,