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WSD-F30-RG

WSD-F30

WSD-F21HR-RD

WSD-F21HR

WSD-F20A-BU

WSD-F20

OS Wear OS by Google
Display 1.2-inch, dual layer display - OLED (390 × 390 pixels) and monochrome LCD 1.32-inch, dual layer display - Color TFT (320 × 300 pixels) and monochrome LCD 1.32-inch, dual layer display - Color TFT (320 × 300 pixels) and monochrome LCD
Touchscreen Capacitive touchscreen (anti-fouling coating)
GPS Compatible (including GLONASS and Michibiki)
Color Maps (supports offline use)
Environmental Durability Compliant with MIL-STD-810G (a United States Military Standard issued by the US Department of Defense)*1
Low-temperature resistance (−10°C/14F), 5-bar (50-meter) water resistance*2
Sensors Compass (magnetic) sensor, pressure (air pressure, altitude) sensor, accelerometer, gyrometer Optical sensor (heart rate), Compass (magnetic) sensor, pressure (air pressure, altitude) sensor, accelerometer, gyrometer Compass (magnetic) sensor, pressure (air pressure, altitude) sensor, accelerometer, gyrometer
Heart Rate Measurement
Other Microphone, vibrating alert Microphone, vibrating alert Microphone, vibrating alert
Charging Time Approx. 3 hours at room temperature Approx. 2.5 hours at room temperature Approx. 2 hours at room temperature
Battery Life**3 Not Using GPS / Approx. 1.5 days*4, Using GPS (Prioritizing battery life) / Up to 30 hours*4, timekeeping and sensors only / Approx. 1 month Not Using GPS / Approx. 1.5 days*5, Using GPS (Prioritizing battery life) / Up to 20 hours*5*6, timekeeping and sensors only / Approx. 1 month Not Using GPS / Approx. 1 or more days*7, Using GPS (Prioritizing battery life) / Approx. 25 hours**7, timekeeping only / Approx. 1 month or more
No. of Downloaded Maps Saved Up to 5 places Up to 5 places 1 place
Point Navigation
Measured Values on Monochrome Display
Export of Activity Records from Casio Apps LOCATION MEMORY, ACTIVITY LOCATION MEMORY, ACTIVITY LOCATION MEMORY
Display of Latitude / Longitude Information with the TOOL App
Size (H × W × D of the watch only) Approx. 60.5 × 53.8 × 14.9 mm Approx. 61.7 × 57.7 × 16.8 mm Approx. 61.7 × 57.7 × 15.3 mm
Weight (including wristband)) Approx. 83 g Approx. 81 g F20: Approx. 92g
F20A: Approx. 90g
Possible Band Sizes (when attached) Soft urethane band: 140-210 mm Soft urethane band: 145-210 mm Soft urethane band: 145-215 mm
Removable Band (Slide Lever Type)
Width: 23mm
  • *1 Tested under the following items of military specification MIL-STD-810G. •Shock: Tested to meet MIL-STD-810G Method 516.7 Procedure IV. •Vibration: Tested to meet MIL-STD-810G Method 514.7 Procedure I. •Humidity: Tested to meet MIL-STD-810G Method 507.6 Procedure II. •Solar radiation (WSD-F21HR only): Tested to meet MIL-STD-810G Method 505.6 Procedure II. •Low-pressure transport: Tested to meet MIL-STD-810G Method 500.6 Procedure I. •Low-pressure operation: Tested to meet MIL-STD-810G Method 500.6 Procedure II. •Low-temperature transport: Tested to meet MIL-STD-810G Method 502.6 Procedure I. •Temperature shock: Tested to meet MIL-STD-810G Method 503.6 Procedure I-C. •Ice accretion: Tested to meet MIL-STD-810G Method 521.4 Procedure I. (The device has been tested to perform under test conditions, but is not guaranteed to operate under all conditions in actual use. Not guaranteed against damage or accidents.)
  • *2 Casio test conditions.
  • *3 The values provided here are based on measurement conditions defined by Casio. Actual values might vary depending on factors such as the environment in which the customer uses the watch, the app being used, the smartphone to which the watch is connected, and the system configuration.
  • *4 Color display auto OFF: When “Always have screen ON” is disabled in the screen settings. When the watch is not in use, the display switches to monochrome to extend battery life. (Enabled by default for the WSD-F30.)
  • *5 Color display auto OFF: When “Always have screen ON” is disabled in the screen settings. When the watch is not in use, the display switches to monochrome to extend battery life. (Enabled by default for the WSD-F21HR.)
  • *6 When prioritizing battery power.
  • *7 Regular color display: When “Always have screen ON” is enabled in the screen settings. When the watch is not in use, a color display with lower brightness and activity is used. (Enabled by default for the WSD-F20.)