Tough Solar (Solar Charging System) Water-resistant to 10 atmospheres Radio wave reception: Automatic reception (up to 6 times/day) (up to 5 times/day for Chinese signals) / Manual reception 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 *When the home time setting is set to a city where reception is available, the watch will receive signals from the station corresponding to that city. The time zone difference is set based on the selected city. Automatic Hand Position Correction Hand Retraction Function (Manual, Automatic (during altitude, barometric pressure, and temperature measurement)) World Time: Time display for 29 cities worldwide (29 time zones, with daylight saving time setting) + UTC (Coordinated Universal Time), Home Time City Swap Function, UTC Direct Call Function Bearing Measurement Function: ・Measures 16 directions and bearing angles (0–359°) ・Continuous bearing measurement (60 seconds) ・North-seeking function ・Magnetic declination correction function ・Bearing correction function (2-point correction) Altitude Measurement Function / Relative Altimeter (Measurement range: –700 to 10,000 m, in 1 m increments) ・Elevation difference indicator (Measurement range 1: 100 m / 5 m increments, Measurement range 2: 1,000 m / 50 m increments) ・Elevation trend graph display ・Measurement interval setting function (5 seconds / 2 minutes) ・Elevation memory (Manual memory for up to 30 entries: measurement date, time, and elevation) ・Automatic data logging (maximum/minimum altitude, automatic cumulative ascent/descent memory) Barometric pressure measurement function (Measurement range: 260–1,100 hPa, in 1 hPa increments) ・Barometric pressure trend graph display (Displays data for the past 20 hours) ・Barometric pressure difference indicator (Measurement range: ±10 hPa, in 1 hPa increments) ・Barometric pressure trend information alarm(Alerts you with an arrow and an audible tone when significant changes in barometric pressure occur) Temperature measurement function (Measuring range: -10 to 60°C, 0.1°C increments) Stopwatch (1/100-second resolution, 24-hour timer) Timer (Set in 1-minute increments, maximum set time: 60 minutes, measured in 1-second increments) 5 alarms and hourly chime Battery indicator display Power-saving function(In dark environments, the display turns off and the hands stop after a certain period of time to conserve power) Full auto calendar 12/24-hour format switch Low-temperature resistant (-10°C) Operation sound on/off switch Dual LED lights: ・Dial LED light (with full auto light, super illuminator, afterglow function, and afterglow duration switch (1.5 seconds/3 seconds)) ・LED backlight for LCD display (with full auto light, super illuminator, afterglow function, and afterglow duration switch (1.5 seconds/3 seconds)) Operating time from full charge without solar power generation ・When functions are in use: Approx. 6 months ・In power-saving mode: Approx. 25 months