Calculator with easy to use, raised keys; 8 digits (7 digits for negatives). Basic calculations, chain & mixed operations; Dual time mode; 12/24 hour time formats;1/100 second stopwatch measuring up to 23hrs, 59.59 mins; Water Resistant; Daily alarm with hourly time signals; Auto-calendar to year 2079. 2 year warranty. Our price includes UK delivery and a FREE spare, Swiss made CR2016 battery!