G-shock Titanium Solar Radio Bluetooth Sports Watch MRG-B2100D-2AJR MRG-B2100D-2A Band: Titanium band Length: 150-205mm/25.5mm Case size: 49.5×44.4×13.6mm Mass: 122g Shock-resistant structure Magnetic resistant watch (JIS class 1) Tough solar (solar charging system) 20 ATM waterproof function Radio reception function: automatic reception (up to 6 times/day) (up to 5 times/day for Chinese radio waves)/manual reception Received radio wave: JJY, frequency: 40kHz/60kHz (model compatible with both Fukushima/Kyushu stations) Received radio wave: WWVB, frequency: 60kHz Received radio wave: MSF/DCF77, frequency: 60kHz/77.5kHz Received radio wave: BPC, frequency: 68.5kHz *If you set your home time setting to a city where you can receive stations, you will receive stations tailored to your city. Note that the time difference is set depending on the city or time zone. Mobile link function (function interlocked with compatible mobile phones via Bluetooth (R) communication) Automatic needle position correction function Power saving function (in dark places, the hands will stop moving after a certain period of time to save power) Full auto calendar Date/day of the week display LED light (super illuminator, with afterglow function) Driving time from full charge when using the function without solar power generation: Approximately 5 months / In power saving mode: Approximately 18 months.