Classic design. Modern tech. This 44mm Carlyle HR touchscreen smartwatch features a black silicone strap speaker functionality increased storage capacity and three smart battery modes to extend battery life for multiple days. 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. 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 minimise potential for RF interference. See product insert for full details.