Hybrid Smartwatch HR (Heart Rate) works with iPhone and Android Phones. Enjoy long lasting battery. This is a smart watch that can last up to 2+ weeks on a single charge. Magnetic USB charger included. Varies based on usage and after updates install. Equipped with Heart rate sensor for in-depth wellness tracking. Keep track of your steps active minutes calories heart rate sleep. This is one smart watch - Receive and view smartphone notifications and alerts see calendar and weather updates control your music and more. An innovative timepiece designed with integrated mechanical hands and an always-on read-out display showing curated information at a glance; Case size: 42mm; Band size: 22mm; interchangeable with all Fossil 22mm bands; water resistant to 165ft (50m); imported.