Brand new, complete set, full warranty The MTG-B4000D features an updated Dual Core Guard structure with a frame design integrating carbon fiber and stainless steel, which was developed with the aid of artificial intelligence trained with big data on impact resistance. A seamless collaboration between AI capabilities and human developers, this timepiece creatively integrates materials, structure, and design into an organic whole of functional beauty. Base designs created by human designers were analyzed and simulated by AI and then further refined by the human hand to render a unique form that organically synthesizes functionality and beauty. The intricate, dimensional form of the frame is cut out from a base material of laminated carbon and glass fiber sheets, creating a beautifully layered pattern. The stainless-steel components of the bezel, featuring a dual-layer design of inner and outer bezels, are polished with separate hairline and mirror finishes for a sophisticated textural look. The band also features a layered composite construction that integrates stainless steel and carbon fiber-reinforced resin. Combining the ruggedness of metal and lightness of resin, the band has a solid, substantial feel, while ensuring a comfortable fit. Case size (L× W× H) 56.6 × 45.3 × 14.4 mm Weight icon-question 178 g Case and bezel material Carbon / Stainless steel Band Layered Composite Band One-touch 3-fold Clasp Construction TRIPLE G RESIST (Shock resistant, Centrifugal force resistant, Vibration resistant) Carbon Core Guard structure Water resistance 200-meter water resistance Time adjustment Radio-controlled Watch; Multi band 6 Bluetooth: Connects to a smartphone and automatically adjusts the time Power supply and battery life Tough Solar (Solar powered) Smartphone Link/App Connectivity Features Smartphone Link feature Mobile link (Wireless linking using Bluetooth) Apps CASIO WATCHES App connectivity feature Auto time adjustment Easy watch setting Approximately 300 world time cities Time & place Watch status display Self check Phone finder Exterior Glass Sapphire crystal with anti-reflective coating Crown Screw Lock Crown Compatible band size 150 to 205 mm Other Neobrite Watch Features World time World time 38 time zones (27 cities + coordinated universal time), Home city time swapping, auto summer time (DST) switching * Subject to updates by connection between the watch and a phone. Stopwatch 1-second stopwatch Measuring capacity: 23:59'59 Timer Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-second increments) Alarm/hourly time signal Daily alarm Light LED light (Super Illuminator) Afterglow Light color LED:White Calendar Full auto-calendar (to year 2099) Hand home position correction feature The auto hand home position correction Energy saving feature Power Saving (hands stop to save power when the watch is left in the dark) Battery display/alert Battery level indicator Run time Approx. battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after charge) 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Accuracy Accuracy: ±15 seconds per month (with no signal calibration and mobile link function) Other features Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day) Day indicator Date display Time adjustment details 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 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68.5 kHz