G-Shock Military Bluetooth GBD800UC-5 Watch. These are the latest additions to the new POWER TRAINER sports lineup from G-SHOCK. 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 & 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 & 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 & send them to the watch, to store stopwatch measurement data, to view data & more. All of this combines to help you plan & record your workouts, making them more effective & enjoyable. Other features include app-based auto time setting correction & other features for more efficient timekeeping & 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 & 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: Case size (L× W× H): 54.1 × 48.6 × 15.5mm Weight: 59 g Case / bezel material: Resin Shock Resistant 200-meter water resistance 5 daily alarms Hourly time signal Full auto-calendar (to year 2099) Mute feature: Button operation tone on/off 12/24-hour format Approx. battery life: 3 years on CR2025 World time: Dual time (Home time swapping) Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®) Apps: G-SHOCK Connected Sensor feature 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 Stopwatch 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) 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) Target Time alarm up to 10 Target Time settings Timer Countdown timer Timer for interval measurement (up to five time settings) Measuring unit: 1 second Input range: 00'00" to 60'00" (1-second increments) Others: Auto-repeat (number of repeats settable from 1 to 20), auto start Light LED backlight (Super Illuminator) Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow Light color: LED White This watch comes with a new battery & a G-Shock authenticity certificate.