Wear OS by Google
Requirements: Android 4.4+, IOS 9.3+
Water resistance 50 meters
Screen 1.2 inches capacitive touchscreen,
dual layer, color OLED and monochrome LCD
Resolution 390 * 390 pixels
GPS, Glonass, Mitibiki

Supports offline GPS use, can save up to five offline maps
Sensors: pressure (air pressure, altitude), accelerometer, gyrometer, compass (magnetic) sensor
Microphone

Vibro
Bluetooth 4.1, energy saving
Wi-Fi (IEEE 802.11 b / g / n)
Battery charging time approx. 3 hours
Diameter 53.8mm, Height 60.5mm, Thickness 14.9mm
Weight 83 gr

MIL-STD-810 (US military standard issued by the US Department of Defense), low temperature resistance (-10 ° C)

Casio special software: trekking, fishing, cycling, paddle, snow

Bearing, altitude and barometric pressure measurements, sunrise / sunset times, tide graph, activity graph (steps / calories)

AUTONOMY

Without GPS:
1.5 days in color mode
Month in clock only mode monochrome display

With GPS:
3 days with mixed mode color / monochrome display and GPS operation no more than 8 hours

Additional description https://wsd.casio.com/us/en/wsd-f30/features/