Casio has unveiled a new addition to the MT-G line of G-SHOCKs. It has Bluetooth connectivity so as to maintain accurate time via a dedicated phone app. This new 'bright red' MT-G is rated for 200M water- and shock- resistance, as well as its maker's 'tough' solar technology to stay charged.
https://www.notebookcheck.net/Casio-announces-a-new-G-SHOCK-MT-G-connected-watch-with-Vibrant-Red-strap.418132.0.html