This new MUDMASTER model was created especially for this whose work takes it into areas where piles of rubble, dirt, and debris are present. A special vibration-resistant construction lets them stand up to wear while operating cutters, crushers, drills and other heavy machinery to clear way large obstacles. This is CASIO's first analog watch to come with Mud Resist construction, which helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge. Multiple gaskets are used on the pipes that guide buttons and shafts, which keeps mud out. These pipes not only act to protect buttons from impact, they also enhance button operation. The screw-in force of the screw lock bezel on an internal gasket further increases mud resistance. A new bezel structure lets you visually check whether the bezel has been screwed in adequately.In addition, Triple Sensor Version 3 capabilities provide instant access to direction, barometric pressure, and temperature information when needed under tough conditions. The face of the watch is marked with large Arabian numerals as 12, 3, 6, and 9 o'clock for easy reading. The face is illuminated by a double LED light and protected by a sapphire crystal to ensure high visibility under virtually any conditions imaginable.The band surface is processed to resemble a cloth band texture, and the hour and minute hands are shaped with points that make them resemble warning markers. All buttons have a checkered surface for surer operation, and the overall design is tough and rugged. Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China) Receives time calibration radio signals which keep the displayed time accurate Auto receive function (up to 6 times per day/up to 5 times per day for China) Manual receive function Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPC Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, BPC 68.5kHz Tough Solar Power Shock Resistant Mud Resistant Buttons use cylinder type guard structure with gaskets for sfts and cylinders to prevent mud and dust from getting into the watch Vibration Resistant - Alpha Gel (R) Tough Movement Auto hand home position correction Smart Access Electronic Crown w/Quick-lock 200M Water Resistant Fly-back Function Hands move away from LCD screen during measurements Triple Sensor w/Direct Access Button AltimeterMeasuring range: -700 to 10,000 m (-2,300 to 32,800 ft)Measuring unit: 1m (5ft)Hand indication of altitude differentialManual memory measurements: up to 30 records (each including altitude, date and time)Auto log data: High altitude, Low altitude, cumulative ascent, cumulative decentOthers: Relative altitude reading (+/-100m to +/-1000M), selectable measurement interval (5-seconds or 2-minutes) Digital CompassMeasures and displays direction as one of 16 pointsMeasuring range: 0 to 359 degreesMeasuring unit: 1 degree60 seconds continuous measurementHand indication of NorthBidirectional calibrationMagnetic declination correction BarometerDisplay range: 260 to 1,100 hPa (7.65 to 32.45 inHg)Display unit: 1 hPa (0.05 inHg)Hand indication of pressure differentialAtmospheric pressure tendency graphAtmospheric pressure tendency information alarm (beep and arrow indicates significant change in pressure) ThermometerDisplay range: -10 to 60 C (14 to 140 F)Display unit: 0.1 C (0.2 F)Double LED lightLED light for the face (Full Auto LED Light, selectable illumination duration, Afterglow)LED Backlight for the digital display (Full Auto LED light selectable illumtion duration, afterglow)Neo-brite Luminous Hands and Markers World Time29 time zones (29 cities + UTC), daylight saving on/off, home city/world time city swapping 5 Daily Alarms (4 one-time and 1 snooze alarm) Hourly Time Signal  1/100 Second Stopwatch w/Direct AccessMeasuring capacity: 23:59'59.99"Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown TimerMeasuring unit: 1 secondCountdown range: 60 minutesCountdown start time setting range: 1 second to 60 minutes (1-minute increments) Full Auto Calendar (Pre-programmed until the year 2099) 12/24 Hour FormatsButton operation tone on/offAccuracy: +/- 15 seconds per month (with no signal calibration) Storage Battery: Solar Rechargeable BatteryBattery Level IndicatorPower Saving Function (display goes blank and hands stop to save power when left in the dark)Approx. Battery Life: 6 months on a rechargeable battery (operation perio with normal use without exposure to light after charge)25 months on rechargeable battery (operation when stored in total darkness with the power save function on after full charge) Module 5463

This new MUDMASTER model was created especially for this whose work takes it into areas where piles of rubble, dirt, and debris are present.

A special vibration-resistant construction lets them stand up to wear while operating cutters, crushers, drills and other heavy machinery to clear way large obstacles. This is CASIO's first analog watch to come with Mud Resist construction, which helps to ensure that nothing gets into the watch when down and dirty work takes you deep into the dirt and sludge. Multiple gaskets are used on the pipes that guide buttons and shafts, which keeps mud out. These pipes not only act to protect buttons from impact, they also enhance button operation. The screw-in force of the screw lock bezel on an internal gasket further increases mud resistance.

A new bezel structure lets you visually check whether the bezel has been screwed in adequately.In addition, Triple Sensor Version 3 capabilities provide instant access to direction, barometric pressure, and temperature information when needed under tough conditions.

The face of the watch is marked with large Arabian numerals as 12, 3, 6, and 9 o'clock for easy reading. The face is illuminated by a double LED light and protected by a sapphire crystal to ensure high visibility under virtually any conditions imaginable.The band surface is processed to resemble a cloth band texture, and the hour and minute hands are shaped with points that make them resemble warning markers. All buttons have a checkered surface for surer operation, and the overall design is tough and rugged.

• Multi-Band Atomic Timekeeping (US, UK, Germany, Japan, China)
• Receives time calibration radio signals which keep the displayed time accurate
• Auto receive function (up to 6 times per day/up to 5 times per day for China)
• Manual receive function
• Signal: US WWVB, UK MSF, Germany DCF77, Japan JJY40/JJY60, China BPC
• Frequency: US 60kHz, UK 60kHz, Germany 77.5kHz, Japan 40/60kHz, BPC 68.5kHz
• Tough Solar Power
• Shock Resistant
• Mud Resistant
• Buttons use cylinder type guard structure with gaskets for sfts and cylinders to prevent mud and dust from getting into the watch
• Vibration Resistant - Alpha Gel (R)
• Tough Movement
• Auto hand home position correction
• Smart Access Electronic Crown w/Quick-lock
• 200M Water Resistant
• Fly-back Function
• Hands move away from LCD screen during measurements
• Triple Sensor w/Direct Access Button
• Altimeter
  Measuring range: -700 to 10,000 m (-2,300 to 32,800 ft)
  Measuring unit: 1m (5ft)
  Hand indication of altitude differential
  Manual memory measurements: up to 30 records (each including altitude, date and time)
  Auto log data: High altitude, Low altitude, cumulative ascent, cumulative decent
  Others: Relative altitude reading (+/-100m to +/-1000M), selectable measurement interval (5-seconds or 2-minutes)
• Digital Compass
  Measures and displays direction as one of 16 points
  Measuring range: 0 to 359 degrees
  Measuring unit: 1 degree
  60 seconds continuous measurement
  Hand indication of North
  Bidirectional calibration
  Magnetic declination correction
• Barometer
  Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
  Display unit: 1 hPa (0.05 inHg)
  Hand indication of pressure differential
  Atmospheric pressure tendency graph
  Atmospheric pressure tendency information alarm (beep and arrow indicates significant change in pressure)
• Thermometer
  Display range: -10 to 60 C (14 to 140 F)
  Display unit: 0.1 C (0.2 F)
  Double LED light
  LED light for the face (Full Auto LED Light, selectable illumination duration, Afterglow)
  LED Backlight for the digital display (Full Auto LED light selectable illumtion duration, afterglow)
  Neo-brite Luminous Hands and Markers
• World Time
  29 time zones (29 cities + UTC), daylight saving on/off, home city/world time city swapping
• 5 Daily Alarms (4 one-time and 1 snooze alarm)
• Hourly Time Signal 
• 1/100 Second Stopwatch w/Direct Access
  Measuring capacity: 23:59'59.99"
  Measuring modes: Elapsed time, split time, 1st-2nd place times
• Countdown Timer
  Measuring unit: 1 second
  Countdown range: 60 minutes
  Countdown start time setting range: 1 second to 60 minutes (1-minute increments)
• Full Auto Calendar (Pre-programmed until the year 2099) 
  12/24 Hour Formats
  Button operation tone on/off
  Accuracy: +/- 15 seconds per month (with no signal calibration)
• Storage Battery: Solar Rechargeable Battery
  Battery Level Indicator
  Power Saving Function (display goes blank and hands stop to save power when left in the dark)
  Approx. Battery Life: 6 months on a rechargeable battery (operation perio with normal use without exposure to light after charge)
  25 months on rechargeable battery (operation when stored in total darkness with the power save function on after full charge)
• Module 5463