This ultra-lightweight 41mm fossil sport smartwatch features a gray silicone strap and lets you track your heart rate and workout (even swimming), customize your dial, and more. Smartwatches powered with wear os by google are compatible with iphone® and android™ phones. Wear os by google and other related marks are trademarks of google llc. Touchscreen smartwatches powered with wear os by google require a phone running android os 4. 4+ (excluding go edition) or ios 9. 3+. Supported features may vary between platforms. To avoid damage to your watch, only use with included charger. Do not use a usb hub, usb splitter, usb y-cable, battery pack or other peripheral device to charge. Product should be kept more than 20cm away from implanted medical devices to minimize potential for rf interference. See product insert for full details.