- Case & Bezel: Hybrid titanium & bio resin
- Size: 52mm (width) × 50.3 (L2L) × 18 (height) mm
- Weight: 115 grams
- Crystal: Mineral
- Tough Solar Power
- Shock Resistant
- ISO 200M Water Resistant
- Full Auto EL Backlight with Afterglow
- World Time 31 times zones (48 cities + UTC), city code display, daylight saving on/off
- Moon Data (moon age of the specific data, moon phase graph)
- Tide Graph (tide level for specific date and time)
- Dive time and surface interval measurement function Dive time: 1 second increments, up to 23:59'59 Surface interval: 1 minute increments, up to 47:59'59 Memory capacity: One set of data (dive time, dive start time and surface interval)
- 1/100 second stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times
- Countdown timer Measuring unit: 1 second Input range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
- 4 Daily alarms and 1 Snooze Alarm
- Hourly time signal
- Battery power indicator
- Power saving function
- Button Operation Tone on/off
- Full auto-calendar (pre-programmed until the year 2099)
- 12/24 hour formats
- Accuracy: +/- 15 seconds per month
- Storage battery: Solar rechargeable battery
- Approx. battery life: 8 months on full charge (without further exposure to light)
- Module: 3521
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