Times can be displayed in either 12-hour or 24-hour format. Allowances are made automatically for months of different lengths, including leap year. Battery lasts for at least three years. The value indicates actual battery life. The daily alarm sounds each day at the time you set. The value indicates how many daily alarms are available. The hourly time signal causes the watch to beep every hour on the hour. Accurate measurement of elapsed time with the touch of a button. The fraction indicates the unit of measurement, while the time figure indicates the maximum time measurement. An electro-luminescent panel causes the entire face to glow for easy reading. lncludes EL Dual This dual light illuminates both the text panel and LCD screen. An EL light is used for illumination. an After-Glow feature that keeps the EL backlight turned on for a few seconds after the light button is released. Stainless Steel Band Water resistant under normal, everyday use.