Smart watches will get you killed at night. Al-Qaeda used the Casio F-91W - which is cheap, extremely common, weighs nothing, is water resistant, has a button for the screen light, doesn't
Casio F-91W Durability Test - F91W Hammer Hit test, Strap tested, water resistance - YouTube
Is the Casio F91W waterproof? - Quora
Casio F91W-1 Wrist Watch for Men for sale online | eBay