Once it detects light again, or a button is pushed

Once it detects light again, or a button is pushed,or the watch is angled toward your face for reading, it awakens again. The LCDscome back on, and the analog hands scurry back into their proper places. Neattrick.Atomic timekeeping. This watch will calibrate itself up tofive times a day using a radio signal broadcast by the cesium clock in FortCollins, Colorado (or one of the two atomic clocks in Japan, depending on howthe watch is configured). Calibration attempts are made at 1:00 a.m., 2:00 a.m.,3:00 a.m. and 4:00 a.m., and if none of those were successful, again at 5:00a.m. (if nothing else, this watch is persistent). It chooseslate night/early morning with the assumption you are asleep, and the watchis sitting peacefully beside you, dutifully facing Fort Collins near a window.The watch also records the date and time of its last successful calibration,so don't worry about trying to stay awake to monitor it's progress.Signal strength indicator. Very handy for finding the optimal spot to letyour watch soak up the time calibration rays.Analog and digital time synchronization. This means thatthe hands on this watch are actually just an analog representation of the digitaltime. This may seem obvious, but Casio actually makes analog/digital watcheswhere this is not the case. You canset the analog hands to be inconsistent with the digital time, but theywill still be in-sync, just with an offset between them. I have another analog/digitalG-Shock that arrived with the hands way off for some reason, but it was quiteeasy to get them synchronized, and they have stayed in-step ever since.World time. 30 cities (29 different time zones) around the world.Five alarms. Each is an independent daily alarm.