Casio G-SHOCK GBD-100-1A7DR WatchG SQUAD GBD 100 SERIES GBD 100 1A7 Distance measurements via the accelerometer are corrected by linking with smartphone GPS functions via Bluetooth connection. In addition to tracking running pace by comparing the distance measured with running time, it is also equipped with an auto lap function. It supports daily training via the combination of a conventional step tracker, an interval timer, a lap timer, and a calorie consumption calculator. It also