Casio G-Shock Mens 200m Carbon Bluetooth Frogman Royal Navy (GWF-A1000RN-8ADR) Features and Specifications Case / bezel material: Carbon / Stainless steel - Resin BandNeobriteSpherical Glass - Screw Lock Crown - Carbon Core Guard structure - Magnetic Resistant - Shock Resistant - Sapphire crystal with a glare-resistant coating - ISO 200 meters Water Resistance - LED light (Super illuminator)Afterglow - Tough Solar (Solar powered)Time calibration signal reception - Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful)*5 times a day for the Chinese calibration signal - Manual receive - The latest signal reception results - Time Calibration Signals - Station name: DCF77 (Mainflingen, Germany)Frequency: 77.5 kHzStation name: MSF (Anthorn, England)Frequency: 60.0 kHzStation name: WWVB (Fort Collins, United States)Frequency: 60.0 kHzStation name: JJY (Fukushima, Fukuoka/Saga, Japan)Frequency: 40.0 k - Hz (Fukushima) / 60.0 k - Hz (Fukuoka/Saga)Station name: BPC (Shangqiu City, Henan Province, China)Frequency: 68.5 kHzDiving mode - Dive time: 1 second increments, up to 1:59'59Surface time measurement: up to 24 hours - Log data: up to 30 records - Mobile link (Wireless linking using Bluetooth )The auto hand home position correction - Dual time27 time zones, Home time swapping, auto summer time (DST) switching1-second stopwatch - Measuring capacity: 23:59'59Countdown timer - Measuring unit: 1 second - Countdown range: 24 hours - Countdown start time setting range: 1 minute to 24 hours (1-second increments)Daily alarm - Power Saving (hands stop to save power when the watch is left in the dark)Hand shift feature (Hands move out of the way to provide an unobstructed view of indial)Full auto-calendar (to year 2099)Date display - Day indicator - Regular timekeeping - Analog: 3 hands (hour, minute (hand moves every 5 seconds), second), 3 dials (dual time hour and minute, dual time 24 hour, day)Accuracy: ±15 seconds per month (with no signal calibration and mobile link function)Approx. battery operating time:5 months on rechargeable battery (operation period with normal use without exposure to light after charge)30 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)Size of case : 56.7×53.3×19.7mm - Total weight : 119g