M6 GPS Rugged Smart Watch for Men, 50mm, MIL-STD-810H Tested 3 bands, 24-hrs continuous GPS, ABC sensors, 15-day battery, 5ATM waterproof, 1.43" AMOLED, 178 sport modes

Altimeter, Barometer, Compass: live elevation, a pressure trend that appears before the clouds do, and a bearing that works with your phone off. The three readings Altimeter, Barometer, Compass matter when you're a day's walk from a road, and none of them need a tower, a phone, or an app.
Two Weeks Between Charges: the 520mAh cell runs about 15 days on typical use, 910 if you lean on it hard, 56 with the always-on display, and up to 70 days on standby. Roughly 2~3 hours to refill on the magnetic dock plug it in Friday, forget it until the next trip.
Built-in GPS: locks on with 6 satellite systems and logs route, pace and distance for up to 24 hours straight. First fix takes about 2 minutes under open sky, so get it before you head into cover.
MIL-STD-810H Tested: zinc alloy body, hardened glass, stainless steel back plate, sealed to 5ATM (164 ft). Pool, ocean, heavy rain just rinse with fresh water after salt or chlorine. Three Bands in the
Box: a metal tactical band on the watch plus two 22mm quick-release silicone straps. Swap in seconds. 5.0 oz on steel, 2.7 oz on silicone, 50mm case. Most brands sell you the second band separately. 178 Sport Modes, 6
That Start Themselves: walking, running, outdoor cycling, elliptical and rowing begin on their own. Plus 24/7 heart rate with high and low alerts, SpO2 spot checks, stress and mood, and REM sleep stages. Works with iPhone (iOS 9.0 +) and Android ( 5.0 +) through GloryFit Pro no subscription, ever