10 days battery life: Up to 10 days of battery life and quick charge function. Better sleep: Sleep tracking, personal sleep profile, breakdown of sleep index, intelligent alarm clock and sleep mode. Stress management: Always-on health tracking, stress management, mindfulness exercises, guided breathing exercises, SpO2, dashboard with health scores, cycle tracking, resting pulse. Move more: heart rate measurement, daily shape index, tracking of active zone minutes and activities, 20+ training modes, automatic training detection, movement reminders. iOS/Android: Compatible with iOS 14+ and Android 8+. Note: Floatproof (Water resistant to 50 meters). After getting the band wet, we recommend drying the band as it is best for your skin as with any portable device when the band is clean and dry.

Technical Details Age Range: ‎Adult Color: ‎Midnight black Size: ‎One Size Style: ‎Minimalist Compatible with: ‎Smartphone Display Size: ‎0.7 Inches Display Type: ‎Digital Shape: ‎Oval Material Type: ‎Plastic Meter: ‎Optical heart rate sensor, skin temperature fluctuation sensor Number of Items: ‎1 Features: ‎Activity Tracker, Calendaring, Time Display Sport: ‎Swimming Wattage: ‎3 watts Included Components: ‎Tracker, charger Batteries Included?: ‎Yes Brand: ‎Fitbit Department: ‎unisex_adult Manufacturer: ‎Fitbit Item model number: ‎FB424BKBK Product Dimensions: ‎3.93 x 1.86 x 1.17 cm; 130 g ASIN: ‎B0B6WRFY5S Additional Information Batteries: 1 Lithium Polymer batteries required. (included) Date First Available: 25 Aug 2022 Is Discontinued By Manufacturer: No

Tracker, charger