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 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.

Casio Mudmaster Watch (GWG1000-1A3) Specifications:

• 5 daily alarms
• Hand shift feature (manual or auto (during altitude, barometric pressure, and temperature measurement))
• Battery level indicator
• Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
• Full auto-calendar (to year 2099)
• 12/24-hour format
• Button operation tone on/off
• Case / bezel material: Resin / Stainless steel
• Water Resistance: 200-meter
• Size of case : 59.5×56.1×18mm
• Total weight: 119g