Brand new Fitbit Charge 3 (Tracker/Pebble Only), Sensors Components 3-axis accelerometer Optical heart rate monitor Altimeter Vibration motor Relative SpO2 sensor Display Touchscreen Grayscale OLED Battery and Power Fitbit Charge 3 has a battery life up to 7 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. We recommend charging your tracker every few days to ensure you are always tracking. Battery type: Lithium-polymer Charge time (0-100%): Two hours Radio transceiver: Bluetooth 4.0 Memory Saves 7 days of detailed motion data – minute by minute Saves daily totals for past 30 days Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times Water Resistance Fitbit Charge 3 is water resistant to 50 meters. After swimming or 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. We do not recommend wearing Charge 3 in a hot tub or sauna. Heart Rate Like all heart rate tracking technologies, accuracy is affected by physiology, location of device, and different movements. Syncing Fitbit Charge 3 syncs automatically and wirelessly to computers and 200+ leading iOS, Android Windows devices using Bluetooth LE wireless technology. Windows compatibility coming soon. Syncing range: Approx. 20 ft Certain features like smartphone notifications may require Android 5.0+ PLEASE NOTE: It will be in a sealed bag. Perfect if you need to replace your broken screen, or buy accessories separately and save money. What you get is what you can see on picture 3. (it's an example photo). *PLEASE NOTE** : charger, band or other accessories are NOT included. Free Shipping! Please verify the estimated shipping date listed above. We take 2-3 handling days depending on demand. In most cases, your order will be shipped within 24-48 hours. Only 1 order per customer/household. Color is BLACK (Subject to availability)! Confirmed Paypal address only No Cancellation or refund allowed