Here is a smart wearable device that lets you control your smartphone and time your workouts conveniently. The ArcX fitness ring lets you accept calls, trigger a SOS call, take a selfie, and record your split and lap times. It has playlist, call, and stopwatch modes.
This ring is waterproof and ready for the heat and snow. Its companion app lets you configure directional controls, switch profiles, and change SOS settings. It lasts up to 5 days on battery. This ring is drop tested to 1.7m.