Case dimensions (H × W × D): 56.7 × 47.3 × 14.1 mm Weight: 102 g Case and Bezel Material: Carbon Fiber-Reinforced Resin (Biomass Plastic) / Stainless Steel Band: Soft Urethane Band (Biomass Resin) Structure: Triple G-Resist (Shock-Resistant Structure, Centrifugal Force Resistance, Vibration-Resistant Structure) Carbon Core Guard Structure Water-Resistant to 20 Bar Time Correction: Radio-Controlled Watch (Compatible with Japan, North America, Europe, and China regions) MULTIBAND6 Bluetooth: Connects to a smartphone for automatic time correction Power Source & Battery Life: Tough Solar (solar charging system) Mobile Link Function (Function synchronization via Bluetooth communication with compatible mobile phones) App Link Function: Automatic time correction, easy watch settings, world time for approximately 300 cities, flight log, mobile phone finder Glass: Spherical/curved glass Sapphire glass with anti-reflective coating on the inner surface Crown: Screw-lock crown Strap size range: 145–215 mm Neobrite World Time Timer LED light (Super Illuminator with afterglow function) Full Auto Calendar Power Saving Function Operating time from full charge without solar power generation When functions are in use: Approx. 5 months In Power Saving mode: Approx. 22 months Date and Day of the Week Display Magnetic Field Detection Stopwatch Alarm Automatic Hand Position Correction (with shock detection) Battery Indicator Radio Wave Reception: Automatic reception (up to 6 times/day) (up to 5 times/day for Chinese signals), Reception signal: JJY, Frequency: 40 kHz / 60 kHz (Model compatible with both Fukushima and Kyushu stations) Reception signal: WWVB, Frequency: 60 kHz Reception signal: MSF/DCF77, Frequency: 60 kHz/77.5 kHz Reception signal: BPC, Frequency: 68.5 kHz *If the home time setting is set to a time zone where standard radio wave reception is available, the watch will receive signals from the station corresponding to that time zone. Home Time City (Cities with reception capability) / Reception Signal Tokyo / Japanese standard signals JJY40 and JJY60 Los Angeles, Denver, Chicago, New York, Halifax / U.S. standard signal WWVB London, Paris, Athens / UK standard signal MSF and German standard signal DCF77 Beijing / Chinese standard signal BPC