Perfect for beginner to intermediate exercisers, this heart rate monitor includes a comfortable splash-proof chest belt that wirelessly sends analog heart rate data to the watch. The visual heart rate alert will beep and the icon display will flash if you are below or above your target training zone, allowing you to safely maximize your workout. Staying on track with a routine is easy with the help of the built-in stopwatch function and Smart Training program. Other great features include: HiGlo™ electro-luminescent backlight for easy viewing, 12/24-hour clock with alarm, month/day/date display, and water resistance up to 150 feet. Batteries: 1-CR2032 (watch) and 1-CR2032 (chest strap) included.