Take your fitness game to the next level with the GSHOCK GBA-900-1ADR. This rugged and stylish watch allows you to access your smartphone GPS via Bluetooth for precision accelerometer measurement. Simply use your smartphone to take initial measurements of specific spans, and then let the timepiece accurately measure these distances on its own. With the GSHOCK GBA-900-1ADR, you can easily track your distance, speed, pace, and calories burned, allowing you to stay on top of your fitness goals. Whether you're hitting the trails or pounding the pavement, this watch has got you covered.