Android Wear 2.0;
Requirements: Android 4.3, iOS 9;
Water protection 50 meters;
Screen 1.32 inches touch capacitive, dual-layer, TFT-LCD plus monochrome, resolution 320 * 320 pixels;
GPS, Glonass, Mitibiki;
Sensors: pressure, altitude, acceleration, gyroscope, magnetic sensor;
Microphone;
Bluetooth 4.1, with conservation of energy;
Wi-Fi 802 b / g / n;
Li-ion battery;
Charging time 2 hours;
Weight 92 gr.

Autonomy

Without GPS:

1 day in color screen mode;
2 days in color screen mode with auto power off;
Month - in the mode only hours.

With GPS:

6-8 hours with the screen on
7-9 when the screen is off
1 day with a 6-minute interval of connection with the satellite
in the same mode with the screen off - 2 days

Battery CASIO WSD-F20

Watch for active people use a lithium-ion battery as their energy source. The battery life is more than 1 day under conditions that Casio calls "normal operation", but with the constant use of GPS this period is significantly reduced. This is indeed the problem of all the smart hours of our time, especially when they are intended for camping use. In any case, in the evening you will have to camp and find an extra power source to charge the clock. There is also a "clock" mode, in which the charge is enough for a whole month, but then you can not use the smart functions of the gadget.

CASIO WSD-F20 Functionality

As a street clock from the Pro Trek Smart watch series, the CASIO WSD-F20 uses energy-efficient GPS, which the user can use both online and offline. The integrated low power GPS supports data from three different satellites for the most accurate triangulation: American GPS, Russian GLONASS and Japanese MICHIBIKI QZSS. These satellites instantly determine the location and display your position on a full-color map.