The good-looking designs and utility colors of these models maximize 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.

Major Features:

• Smartwatch Functionality
• Smartphone Connectivity
• Shock Resistant
• 20 bar water resistant (200-meter water resistance)

Watch Features:

• World Time: Dual time (home time swapping)
• 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)
• Light: LED backlight (Super Illuminator) Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow
• Light Color: LED:White
• Calendar: Full auto-calendar (to year 2099)
• Energy Saving Feature: Power Saving (Display goes blank to save power 3 hours everyday.)
• Run Time: 5 months on rechargeable battery (operation period with normal use without exposure to light after full charge) 26 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
• 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
• Alarm/Hourly Time Signal: 5 daily alarms | Hourly time signal
• Mute Feature: Button operation tone on/off 
• Accuracy: ±15 seconds per month

Sensor Feature Details:

• 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

Smartphone Link | App Connectivity Features:

• Smartphone Link Feature: Mobile link (Wireless linking using Bluetooth®)
• App: CASIO WATCHES
• App Connectivity Feature: 
  Auto time adjustment
  Easy watch setting
  Approximately 300 world time cities
  Life log data
  Stopwatch data transfer
  Phone finder

Specs:

• Case Size: 52.3 mm x 49.3 mm x 15.2 mm
• Compatible Band Size: 145 to 215 mm
• Weight: 57g
• Water Resistance: 200-meter
• Case and Bezel Material: Resin
• Band Material: Resin
• Glass: Mineral Glass
• Construction: Shock Resistant
• Time Adjustment: Bluetooth | Connects to a smartphone and automatically adjusts the time
• Power Supply & Battery Life: Approx. battery life: 2 years on CR2032

• Sensor Feature: Training Function Display of distance, speed, pace, and other calculated values based on accelerometer, auto/manual lap times, Auto Pause, target alert setting (time, calories burned) on/off, training display customization (elapsed time, distance, pace, lap time, lap distance, lap pace, average pace, speed, average speed, calories burned)

What's included:

• One G-SHOCK - GBD-800UC-8
• One Instruction Manual