Our Timex IRONMAN® HRM + Activity Tracker is a watch born of necessity. Inspired by a renewed appreciation for our health, wellness, and the great outdoors, this sporty 43mm timepiece is designed to help empower a better, healthier you. 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. We’ve 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. Number of Batteries: 1 Included: 100 Watch(es) Features: Batteries Included, Quick Ship Battery Type: Lithium Ion Jewelry Closure: Buckle Power Source: Battery (included) Water Resistance: 50m Band Color: Black Case Thickness: 12mm Case Width: 43mm Watch Band Length: 8 Inch Band Content: Resin Case Materials: 100% Resin Battery Size: Cr1216 Band Width: 16mm Care: Wipe Clean Band Type: Strap Country of Origin: Imported Quick Ship items ship directly from the manufacturer within 3 to 5 business days. Photos are enlarged to show detail.