The good-looking designs and utility colors of this Mens G-Shock Power Trainer Multi Function Watch maximizes coordination possibilities with both everyday fashions and training wear. Function-wise, these watches link with the CASIO WATCHES phone app to provide access to a number of functions that enhance workouts. Daily health and fitness support functions include a 3-axis accelerometer that keeps track of step counts, a Multi-Timer that lets you create up to 20 timer combinations of five timers each, memory for up to 200 lap records, and more. The app also makes it possible to maintain step count logs to calculate the calories you burn, to specify a daily step target, to create timer combinations and send them to the watch, to store stopwatch measurement data, to view data, and more. All of this combines to help you plan and record your workouts, making them more effective and enjoyable. Other features include app-based auto time setting correction and other features for more efficient timekeeping, and an Auto LED Light to facilitate workouts in areas where lighting is dim. Back wings on the inside of the bands where they connect to the case, a new band ring shape that prevents sliding, and more band holes to allow better tightness adjustment, all add up to a more comfortable fit. You can make fine adjustments to the band size Smartphone Link Step Count Log Calorie calculation Combinable timers Stopwatch data log Auto time Adjustment four times a day World Time for approximately 300 cities Time swapping Alarm Simple time setting Phone finder Step count using a 3-axis accelerometer (Step Count Graph, step goal progress graphic) Stopwatch with Target Time alarm (lap/split display switching, up to 10 Target Times, 200 lap time records) Interval timer with up to five time settings (Auto repeat up to 20 times, skip, auto start, alert sound) Super Illuminator with Auto light Grey resin band with buckle closure 48.6mm case Day, Date, and Time Display 200M Water Resistant Shock Resistant Style: GBD800UC-8