This is the Casio G Shock G Squad Black Watch GBD200 1D. Say hello to some serious passion for sports with the G SQUAD line of G SHOCK watches. These models feature a square face design in colors chosen to calibrate with the most extreme workouts. Get in on the thinnest G SQUAD yet. Side slits in the bezel allow the color of the inner case to peek through, highlighting just how slim this watch is. The light button is positioned on the case front for handy access to ensure an easy read during night workouts. Access your smartphone GPS via Bluetooth for precision accelerometer measurement.