G-Shock GBD800UC-3ER. These are the latest additions to the new POWER TRAINER sports lineup from G-SHOCK. The good-looking designs and utility colors of these models maximize coordination possibilities with both everyday fashion and training wear. Function-wise, these watches link with the G-SHOCK Connected 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 with five exercise intensity levels, 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. Features include: Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band LED backlight (Super Illuminator) Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow Mobile link (Wireless linking using Bluetooth®) Step count using a 3-axis acceleration sensor: 0 to 999,999 step count display range Step Goal Progress Display (step count goal setting range: 1,000 to 50,000, 1,000-step increments) Step Count Graph: Hourly step count for the past 7 hours on a 6-level graph Step Indicator Power Saving: Auto sensor sleep state entry after fixed period of non-activity Dual time (Home time swapping) 1/100-second stopwatch Measuring capacity:00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Countdown range: 24 hours Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Recorded data: Up to 200 records (measurement start month, date, lap/split times) Countdown timer Timer for interval measurement (up to five time settings) Measuring unit: 1 second Others: Auto-repeat (number of repeats settable from 1 to 20), auto-start 5 daily alarms Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, year, month, date, day Accuracy: ±15 seconds per month (with no mobile link function) Approx. battery life: 3 years on CR2025 Module: 3464 LED:WhiteSize of case: 54.1×48.6×15.5mm Total weight: 59g This watch comes with a G-shock authenticity certificate.