Garmin Instinct 2X Solar

This is the ultimate rugged smartwatch for outdoor enthusiasts, military personnel, first responders, or anyone who wants a massive battery life and a watch that can survive just about anything. The standout feature is the built-in solar charging, which can provide infinite battery life in smartwatch mode under the right sun conditions, plus an incredibly handy built-in LED flashlight.
This is the Tactical model which includes a Kill Switch to wipe user memory, Stealth Mode (stops storing/sharing GPS position and disables wireless connectivity), Night Vision Goggle compatibility, Dual-Format GPS coordinates, and Jumpmaster mode.