Characteristics Weather forecast: Yes Activity monitoring: Yes Calories burned: Yes Thermometer: Yes Calendar notifications: Yes Activity Tracker: Yes Gyroscope: Yes Stopwatch: Yes Training Recommendations: Yes Advanced Training: Yes Music control: Yes Call notifications: Yes Alarm: Yes Fitness Test: Yes Barometer: Yes Interval training: Yes Smart notifications: Yes Measurement of training effectiveness: Yes Smart Awakening: Yes Timer: Yes Sleep quality: Yes Heart rate monitor: Yes SMS notifications: Yes Heart rate measurement Manual Automatic Distance traveled: Yes Calendar: Yes Find my phone: Yes Music playback: Yes Ambient light sensor: Yes Sun and Moon Information: Yes Accelerometer: Yes Electric compass: Yes Workout tracking function: Yes Skin temperature sensor: Yes Tension Monitoring Function: Yes Blood oxygen sensor: Yes Design Market positioning: Smartwatch Shape: Round Water resistance: 5 ATM Wrist size: 110 - 175 mm Strap material: Silicone Housing material: Polymer, Stainless steel Watch case color: Silver Watch case size: 41 mm Power Supported battery type: Built-in Battery type: Lithium-ion (Li-Ion) Battery life: 10 days Battery operation time: 432 h Weight and dimensions Product weight: 33 g Thickness: 1.2 cm Product depth: 41 mm Product width: 41 mm Network ANT+ available: Yes GLONASS: Yes GPS: Yes BeiDou: Yes Quasi-Zenith Satellite System (QZSS): Yes Galileo: Yes Efficiency Flash memory: 8 GB Built-in microphone: Yes FM Radio: No Built-in speakers: Yes Built-in camera: No Display Resolution: 390 x 390 px Screen diagonal: 1.2 Touchscreen: Yes Display type: Digital Display technology: AMOLED Color display: Yes Display diameter: 3.04 cm Glass type: Corning Gorilla Glass 3 Ports and interfaces Bluetooth: Yes Wi-Fi: Yes USB port: No NFC: No Headphone plug: No