<p>Battery &amp; Power:<br><br>• Battery type: Lithium-polymer<br><br>• Charge time (0-100%): Two hours<br><br>• Radio transceiver: Bluetooth 5.0<br><br>------<br><br>Memory:<br><br>• Saves 7 days of detailed motion data, minute by minute<br><br>• Saves daily totals for past 30 days<br><br>• Stores heart rate data at 1-second intervals during exercise tracking and at 5-second intervals all other times<br><br>------<br><br>Sensors and components:<br><br>• Multi-path optical heart rate sensor<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>• Ambient light sensor<br><br>• NFC<br><br>• Built-in GPS + GLONASS<br><br>• Vibration motor<br><br>• Speaker (75dB SPL @10cm)<br><br>• Microphone<br><br>• WiFi (deactivated, cannot be turned on)<br><br>• Device temperature sensor (skin temperature variation available in the Fitbit app). 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>------<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 Versa 4<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 9m<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>• Active Zone Minutes<br><br>• Built-In GPS<br><br>• Cardio fitness score<br><br>• Daily Readiness Score<br><br>• SmartTrack automatic exercise recognition (in app only)<br><br>• Exercise modes<br><br>• Workouts on your phone<br><br>• Steps, distance &amp; calories<br><br>------<br><br>Health features:<br><br>• SpO2 (Blood Oxygen) Tracking<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>Sleep and Stress features:<br><br>• Sleep tracking &amp; sleep stages<br><br>• Sleep Profile<br><br>• Sleep Score<br><br>• Smart Wake alarm<br><br>• Stress Management Score<br><br>• Mindfulness sessions<br><br>• Relax breathing sessions<br><br>• Reflections</p> <p>• 1 Year Manufacturer Warranty.<br><br>• While Stock Lasts.</p> <p>Store in a cool dry place.</p> <p>China</p>