Wave Ceptor's key secret is Atomic Timekeeping which ensures perfect timing via radio signals. These radio controlled watches are dual band which, unlike other radio controlled products, allow you to switch between the UK and mainland Europe time signal transmitters in Rugby and Frankfurt for a wider signal range. Wave Ceptor also has automatic accurate time adjustment, which means it will update itself for British Summer or Winter time, as well as updating within the Central European time zone via world time mode. 1/100 second stopwatch Measuring capacity: 99:59'59" Measuring modes: Elapsed time, lap/split time Memory capacity: Up to 50 sets of data, each set including: month, date, day, and lap/split time Others: 10 target split time alarms; lap time differential, target lap/split time differential 12 / 24 hour formats 5 daily alarmsHourly time signals Low battery warning World time 29 time zones (28 cities), city code display, GMT differential display, daylight saving on/off Auto-calendar (to year 2099) LED Light Afterglow Solar Power World Time 29 time zones (30 cities), city code display, daylight saving on/off 1/100 second stopwatch Hourly time signal Battery power indicator Power Saving (Turns off the display when the watch is left in the dark) Water Resistant 100 Metres