Custom built for the athlete in training, Casio G-Shock's G-Squad Power Trainer collection consists of timepieces designed to be your go to workout companion. The 49.3mm case is expertly crafted from resin and aluminum, a lighter weight model that still maintains the G-Shock's iconic shock resistant toughness. With new Bluetooth(R) capabilities, this watch can link to a smartphone's GPS allowing for distance measurements. Specific workout functions include a step tracker, stop watch, interval timer, lap time measurement, and calories burned measurement. Using a combination of these functions and innovative apps allows you to track your running pace and develop your own, personal training plan. For easy visibility, the display is comprised of a high-definition MIP LCD and the Super Illuminator face maintains that visibility, even in the dark. The black polyurethane band and red accents on the face will coordinate well with your workout gear. Additional features include mineral glass protection, world time, 4 daily alarms, and full auto-calendar.49.3mm resin and aluminum caseShock Resistant200meter water resistant Full Time Smartphone LinkStep trackerHigh Contrast MIP displayFull auto LED (Super Illuminator)4 alarmsStopwatchTimerFull auto calendarWorld Time (38 time zones)2 year battery lifeBlack polyurethane strap with buckle closureCasio G-Shock Style#: GBD-100-1