・Shock-resistant structure ・Tough solar (solar charging system)・Water resistant to 20 ATM ・Radio wave reception function: Automatic reception (maximum 6 times/day) (Chinese radio wave maximum 5 times/day) received radio wave: JJY frequency: 40kHz/60kHz (Fukushima/Kyushu compatible model) received radio wave : WWVB Frequency: 60kHz Receiving radio wave: MSF/DCF77 Frequency: 60kHz/77.5kHz Receiving radio wave: BPC Frequency: 68.5kHz . In addition the time difference is set by the set city.・ 5 world times: 48 cities (31 time zones) + UTC (Coordinated Universal Time) time display home time city replacement function・ Stopwatch (1/100 second (less than 1 hour) / 1 second (1 hour) above) 24-hour meter with split)・ Timer (set unit: 1 second maximum set: 24 hours measured in 1 second units)・ 5 time alarms (only 1 with snooze function) ・Time signal ・Battery indicator display・ Full auto calendar・ 12/24 hour system display switching・ Operation sound ON/OFF switching function・ Date display (month/day display switching)・ Day of the week display (6 languages: English Spanish French German Italian Russian)・ LED backlight (with full auto light super illuminator afterglow function afterglow time switching (1.5 seconds / 3 seconds))・ When using the drive time function without solar power generation from full charge: Approximately 10 months When power saving state: Approximately 22 months GROUP: GW-M5610U