Characteristics Timer: Yes Interval training: Yes Weather forecast: Yes Music control: Yes Heart rate data transmission: ANT+ Calories burned: Yes Stopwatch: Yes Barometer: Yes Recommended activity Bicycle Fitness Swimming Running Tennis Personal information management Alarm Stopwatch Timer Calendar Smart notifications: Yes Heart rate monitor: Yes Activity monitoring: Yes Built-in tape measure: Yes Fitness Test: Yes Ambient light sensor: Yes Calendar: Yes Accelerometer: Yes Alarm: Yes Personal Goals: Yes Heart rate-based calorie calculation: Yes Find my phone: Yes Distance traveled: Yes Sleep quality: Yes Altimeter: Yes Design Product color: Ivory Housing material: Carbon fiber reinforced polymer (CFRP) Water resistance: 5 ATM Watch case color: Mint Security features: Waterproof Lens material: Glass Strap material: Silicone Market positioning: Sports watch Waterproof: Yes Watch case size: 40 mm Strap color: Mint Shape: Round Power Battery type: Lithium-ion (Li-Ion) Rechargeable battery: Yes Battery life: 5 days Battery operation time: 120 h Supported battery type: Built-in Battery life (max): 1 week Weight and dimensions Product width: 40 mm Product depth: 40 mm Product weight: 33.8 g Thickness: 1.1 cm Network Mobile network connectivity: No GPS: Yes Efficiency Supported memory cards: Not supported Built-in camera: No Support for mobile operating systems Android iOS FM Radio: No Package contents Charger: Yes User Manual: Yes Display Display technology: OLED Display type: Digital Touchscreen: Yes Display size: 8.6 x 18.5 mm Resolution: 72 x 154 px Ports and interfaces Bluetooth: Yes NFC: No Wi-Fi: No Other functions Number of batteries supported: 1 Logistics data Number of pieces: 1