Being that this is an all-digital watch face what you normally would call a “dial” is actually best referred to as the “display” since it’s a digital screen. This is not a touch screen but all of the functions of the watch are displayed on this screen and controlled by the 5 buttons surrounding the bezel. All the data can be viewed on the watch’s display or on your smartphone, using the Mobile link feature that pairs the two devices via Bluetooth connection. Movement

No surprises here – just like its sibling, the GBX 100 is powered by a Japanese quartz movement that runs on a CR2032 battery. The accuracy of this caliber is +/- 15 seconds per month, although again it’s flawless when connected to your phone. BatteryFrom what I’ve gathered from watch forum chatter, none of the Casio step-counters are accurate. Word on the street: if you’re serious about using a fitness calculator on your wrist, get a “real” wearable like the models offered by Garmin. It’s a smartwatch Jim, but not as we know it. To read a text from my son required six button pushes. No matter how many times I pressed the buttons I couldn’t reply. After half a day of being more connected to my phone than I wanted to be, I turned off the notifications. Training Function: Display of distance, speed, pace, and other calculated values based on accelerometer, auto/manual lap times, Auto Pause, target alert setting (time, calories burned) on/off, training display customization

A variety of display modes can be activated, although while the MODE and DISPLAY buttons on the left side of the case-control much of this functionality, somewhat counterintuitively, to activate the surfer functions you need to first press the LAP button, then you can access the impressive tide graph, moon data, high and low tide times, and sunrise/sunset times screens. The reason why we consider the GBX 100 model a better value than GBD 200 is simple: it offers more useful features at basically the same price. While there’s no solar charging, at least you still get the mobile link timekeeping feature which sets the watch time automatically. Even if the mobile link does not connect for some reason, the watch will maintain an accuracy rate of ±15 seconds per month.Training Data: Up to 100 runs, up to 140 lap times per run (elapsed time, distance, pace, calories burned)