Mineral Glass Shock Resistant 200-meter water resistance Case / bezel material: Resin Resin Band LED backlight (Super Illuminator) Full auto LED light, selectable illumination duration, afterglow Solar powered 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)