The best part about this sporty watch is you'll almost forget you're wearing it. Pool, beach and shower-resistant, lightweight and perfect for staying active. Featuring an easy-touch heart rate and daily activity monitor, the IRONMAN HRM + Activity Tracker is battery operated—no app, no charging, just function—and comes complete with a battery hatch on the case back for an easy swap when necessary. Timex packed in all the practical features you've come to expect from the Timex IRONMAN® including 50 meters of water resistance; INDIGLO® backlight; chronograph, alarm, and timer; and an impressively comfortable black resin strap.