The Timex Marathon GPS watch lets you track your training. SiRFstarIV™ GPS technology keeps track of your pace, speed and distance data live or figures your averages. The rechargeable Li-Ion battery with charging cable has an eight-hour life in GPS mode. Features include 100-lap memory chronograph, data-review mode, hands-free auto-split based on distance, five customizable alarms, English or metric units, two time zones with manual setting or world time selection of 106 cities, and record of calories burned. Water-resistant to 30 meters. Case diameter: 30mm. Colors: Pink, Black.