About this item Smartwatches powered with Wear OS by Google work with iPhone and Android Phones Extend your battery life for multiple days with new, smart battery modes; magnetic USB charger included; charge up to 80% in under an hour Heart Rate & Activity Tracking using, Google Fit; Built-in GPS for distance tracking; Swimproof design 3ATM; responses from Google Assistant - it's your own personal Google, always ready to help; Speed through checkout with your watch using Google Pay Case size: 44mm; Band size: 22mm; interchangeable with Fossil 22mm bands; Screen Size: 1.28'' display with 416 x 416 resolution; touchscreen functionality; Connectivity: Bluetooth 5.0 LE, GPS, NFC SE, WiFi; wireless syncing;; Warranty type:Manufacturer; 1 Year International Warranty Case Material Type: Stainless Steel; Human Interface Input: Touch Screen Smartwatches powered with Wear OS by Google work with iPhone and Android Phones Extend your battery life for multiple days with new, smart battery modes; magnetic USB charger included; charge up to 80% in under an hour