Characteristics Blood oxygen sensor: Yes Tension Monitoring Function: Yes Sleep Apnea Detection: Yes Personal Goals: Yes Thermometer: Yes Calories burned: Yes Sleep quality: Yes Virtual Partner Feature: Yes Real-time assistance: Yes Activity Tracker: Yes Alarm: Yes Gyroscope: Yes Find my phone: Yes Calendar: Yes Calculation Area: Yes Auto pause: Yes Weather Alert: Yes Distance traveled: Yes Race Predictor: Yes Sun and Moon Information: Yes Accelerometer: Yes Stopwatch: Yes Multisport mode: Yes Measurement of training effectiveness: Yes Suggested Rest Time: Yes Running dynamics: Yes Timer: Yes Heart rate monitor: Yes Electric compass: Yes Barometer: Yes Design Housing material: Fiber reinforced plastic (FRP) Watch case size: 45 mm Watch case color Black White Strap material: Silicone Buckle color: Black Maximum strap length: 20.4 cm Market positioning: Sports watch Shape: Round Belt color White Blue Water resistance: 10 ATM Closure Type: Single Pin Buckle Minimum strap length: 13.7 cm Lens material: Glass Suggested gender: Unisex Wrist size: 137 - 204 mm Power Solar Powered: Yes Battery type: Lithium-ion (Li-Ion) Battery life: 28 days Battery life (power saving mode): 576 h Battery life (in GPS mode): 32 h Supported battery type: Built-in Weight and dimensions Product width: 45 mm Thickness: 1.49 cm Product weight: 52 g Product depth: 45 mm Network ANT+ available: Yes GLONASS: Yes Galileo: Yes GPS: Yes Efficiency Flash Memory: 0.128 GB Support for mobile operating systems iOS Android Package contents User Manual: Yes Charger: Yes Display Resolution: 176 x 176 px Glass type: Power Glass Screen diagonal: 0.9 Touchscreen: Yes Display technology: MIP Always-on display: Yes Display type: Digital Ports and interfaces Bluetooth: Yes