The Rogbid Tank M3 is a new waterproof smartwatch with numerous functions such as health tracking and Bluetooth telephony, and also boasts a huge battery and thus long battery life. Recently launched, it is currently available for less than half the RRP.https://www.notebookcheck.net/Waterproof-Rogbid-Tank-M3-smartwatch-with-large-display-and-huge-battery-launches-with-over-50-discount.780700.0.html
Lots of info in this article except I need to know about having any nickel on the watches as allergy ia a frequent problem with most watches/ nickel.