<p>Battery &amp; Power:<br><br>• Battery life of 6+ days. Battery life and charge cycles vary with use, settings and other factors; actual results will vary. Use of the always-on display, SpO2 and the cEDA sensor will require more frequent charging. Up to 5 hours with continuous GPS. We recommend charging your tracker every few days to ensure you are always tracking.<br><br>------<br><br>Memory:<br><br>• Saves 7 days of detailed motion data, minute by minute<br><br>------<br><br>Sensors and components:<br><br>• Multi-path optical heart rate sensor<br><br>• Electrical sensor to measure skin conductance (cEDA) for body response tracking<br><br>• Multipurpose electrical sensors compatible with ECG app &amp; EDA app. ECG not available in all countries.<br><br>• Red and infrared sensors for oxygen saturation (SpO2) monitoring. Not available in all countries. Not intended to diagnose or treat any medical condition or for any other medical purpose. Intended to help you manage your well-being and keep track of your information. Requires more frequent charging.<br><br>• Altimeter<br><br>• 3-axis accelerometer<br><br>• Skin temperature sensor. Only available in the Fitbit app and only displays variation. Not available in all markets. Not intended for medical purposes. Significant changes in ambient temperature may negatively impact skin temperature tracking.<br><br>• Ambient light sensor<br><br>• WiFi (deactivated, cannot be turned on)<br><br>• NFC<br><br>• Built-in GPS + GLONASS<br><br>• Vibration motor<br><br>• Speaker (75dB SPL @10cm)<br><br>• Microphone<br><br>------<br><br>Display:<br><br>• AMOLED display<br><br>• Corning Gorilla Glass 3<br><br>------<br><br>Water resistance:<br><br>• Water resistant to 50 meters. After getting the band wet, we recommend drying the band because, as with any wearable device, it's best for your skin if the band is clean and dry.<br><br>------<br><br>Band size:<br><br>Both small and large sizes included in box.<br><br>• Small: Fits wrist 130 - 180 mm in circumference<br><br>• Large: Fits wrist 165 - 220 mm in circumference<br><br>------<br><br>What's in the box:<br><br>• Fitbit Sense 2<br><br>• Classic band (small &amp; large)<br><br>• Charging cable<br><br>------<br><br>Requirements:<br><br>Google account will be required.<br><br>The Fitbit app is compatible with most popular phones. To set up and use your Fitbit products and services, you must install the Fitbit app on a compatible device running one of the following operating systems:<br><br>• Apple iOS 16.4 or higher.<br><br>• Android OS 11.0 or higher. See additional tips for Android phones.<br><br>• Syncing range: Up to 30ft<br><br>• Certain features like smartphone notifications may require Android 11+.<br><br>• Syncing requires Bluetooth LE, an internet connection and location permissions granted on the phone.<br><br>------<br><br>Fitness features:<br><br>• Heart Rate Tracking<br><br>• Daily Readiness Score<br><br>• Active Zone Minutes<br><br>• Built-In GPS<br><br>• Exercise modes<br><br>• Steps, distance &amp; calories<br><br>• Cardio fitness score<br><br>• Daily Readiness Score<br><br>• SmartTrack automatic exercise recognition (in app only)<br><br>• Workouts on your phone<br><br>------<br><br>Health features:<br><br>• SpO2 (Blood Oxygen) Tracking<br><br>• Irregular heart rhythm notifications<br><br>• ECG app for heart rhythm assessment<br><br>• Resting heart rate<br><br>• High and low heart rate notifications<br><br>• Heart rate variability<br><br>• Skin temperature variation<br><br>• Breathing rate<br><br>• Wellness Report<br><br>• Blood glucose tracking (in app only)<br><br>• Menstrual health tracking<br><br>------<br><br>Stress and Sleep features:<br><br>• All-day body-response tracking<br><br>• Stress notifications<br><br>• EDA Scan app for stress management<br><br>• Reflections<br><br>• Stress Score Management<br><br>• Relax breathing sessions<br><br>• Sleep tracking &amp; sleep stages<br><br>• Sleep Profile<br><br>• Sleep Score<br><br>• Smart Wake alarm</p> <p>• 1 Year Manufacturer Warranty.<br><br>• While Stock Lasts.</p> <p>Store in a cool dry place.</p> <p>China</p>