Timex Full-Size Ironman Run Trainer GPS Watch GPS-enabled watch measures pace, speed, distance, and more, in real-time Fast, reliable signal with SiRFstar IV GPS technology Customize the display feed with four unique sets of data, which you can download and plot over time to track progress Highly customizable, easy-to-read screen shows three or four lines of data; interval timers, alerts, and 15-workout memory Includes limited one-year manufacturer's warranty. Most GPS watches will go on dormant mode if the battery is lower than 5% to preserve some important settings saved in the memory of the watch. Charge the watch for approximately 1 hour then, while the watch is plugged in, hold down all 4 corner buttons at the same time for approximately 10-15 seconds. This should revive the watch and turn it back on.