NO.1 F18, sports watch with ip68 waterproof, GPS, BEIDOU, GLONASS, three-method positioning system. F18 is a major upgrade to the F5, F7 previous GPS watches. From the design, the hardware, the firmware, F18 is much different from F5, F7. First, the design, F18 uses a highly sealed frame, military design, ip68 waterproof, 316L Steel back cover/buttons, breathable wicking strap (not replaceable), 1.3 inch 3D Ball-Type touch screen, color display. The hardware, F18 does not have built-in altimeter, barometer, but it has built-in GPS sensor, GPS, BEIDOU, GLONASS, three-method positioning system, Geomagnetic sensor. The firmware, make the most of GPS sensors, F18 will support real-time Longitude and latitude measurement. It also supports multi sports, IP68 waterproof makes it support swimming mode. About the GPS positioning, there is a great update. If you get a location in one place, the watch will record this information for the next 3 weeks, and it will be quickly positioned the next time you want to use it. For more details, you can visit NO.1 official F18 page here. https://www.chinawatchs.com/no-1-f18-ip68-gps-ourdoor-rugged-smartwatch-china-smartwatch-html BTW, Aliexpress Brands Shopping Week is coming, all the NO.1 products will be on great discount on DTNO.I Smartwatch Official Store. F18 will also in great discount, the discount will up to 45% off. The F7 will be $40, the F4 will be $20, the K22 will be $52, F13 will be $27.95.
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