This Matteo smartwatch features a black-blue synthetic rubber strap and lets you track your heart rate, customize your dial and more. So, choose from time-or function-based displays for easy access to your favorite features, and add your favorite third-party apps from the Google Play store. Smartwatches powered with Wear OS 4.4+ by Google are compatible with iPhone iOS 9.3+ and Android phones. A battery-efficient dial design provides up to 24 hours of use on a single charge, and the full color display allows you to customize your look.