Fossil Hybrid Smartwatch - Q Gazer Gray Leather Looks like a watch, acts like a smartwatchthese no-charge hybrid smartwatches feature built-in activity tracking, filtered notifications and multiple time zones.Case Size : 41 mm Snap a photo, ring your phone, control your music and more with the customizable link button. Track your everyday accomplishments including steps, distance, and calories burned and monitor your sleep duration and quality. When a notification or alert arrives for a text, email or app update, a gentle buzz lets you know right away. This wrist essential is always on, always connected with a battery life up to six months (based on usage) and automatically syncs to your phone. Fit your style with interchangable straps - compatible with all Fossil brand 20mm straps. Compatibility: Android OS 5.0+, iPhone 5/iOS 9.0+, Smartphone App