Operating System: Powered with Wear OS by Google, Compatibility: Fossil Smartwatches works with phones running the latest version of Android™ (excluding Go edition and phones without Google Play Store) or iOS. Supported features may vary between platforms and countries with compatibility subject to change, Processor: Qualcomm® Snapdragon™ Wear 4100 , Memory: 1 GB RAM, 8GB Storage, Display: 3.2 cm Color AMOLED / 416 x 416 / 326ppi, Input: 2 Additional Push Buttons (configurable), Rotating Home Button, Touchscreen, Voice, Sound/Actuator: Loudspeaker, Microphone, Vibration, Connectivity: Bluetooth 5.0 LE, GPS, NFC SE, WiFiSensors: Accelerometer, Altimeter, Ambient Light, Compass, Gyroscope, Off-body IR, PPG Heart Rate, SPO2, Health: Automatically tracks activity goals, steps, sleep, heart rate, cardio level, SPO2 (blood oxygen), and more. Activity modes with GPS keep you on track with your distance and path. Advanced sensors provide the data to power all your health and fitness apps, Preloaded Apps: Adidas Runtastic, Agenda, Alarm, Amazon Alexa for Smartwatches (available in select markets), Battery-Optimised Activity Mode, Calendar, Cardio Level Tracking, Cardiogram, Contacts, Enhanced Phone Dialer App, Facer, Goals, Google Assistant (available for Andriod only), Google Maps, Google Messages, Google Pay™ (available for Android only), Google Play Store, Nike Run Club, Outdooractive, Smart Battery Modes, Spotify, Stopwatch, Timer, Translate, WaterMinder, Weather, Wellness App with Sleep Tracking, Youtube Music