Case Color: Blue Dial Color: Black Case material: aluminum Strap Material: Silicone App: GloryFit IP protection degree: IP68 Operating System: Android Wear iOS Hardware bluetooth: BT5.0 The best ally for your day-to-day. The San Francisco model with beige strap is a sporty, elegant smartwatch with modern technology. The watch syncs with your phone so you can keep track of your activities and notifications without having to press any buttons. You can monitor your physical activity, heart rate, weather and even your sleep. It uses Bluetooth® technology and allows you to receive notifications with a gentle vibration. The battery has an average duration of 4 to 7 days with normal use, and 15 days at rest. Charging is done via USB.