Fitbit Versa 3 Activity Trackers Health & Fitness Smartwatch GPS FB511 Pink What's included: (1) Fitbit Versa 3 tracker (1) Classic wristband (both small & and large (1) Charging cable Comes with Small & Large Band Small - Fits wrist 5.5" - 7.1" in circumference Large - Fits wrist 7.1" - 8.7" in circumference Sensors & Components Built-in GPS + GLONASS 3-axis accelerometer Altimeter Wi-Fi (802.11b/g/n 2.4GHz) Ambient light sensor Microphones Speaker NFC Vibration motor Optical heart rate sensor Device temperature sensor (skin temperature variation available through Premium only) Battery & Power Battery life up to 6+ days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Use of the always-on display feature will require more frequent charging. We recommend charging every few days to ensure you’re always tracking. Battery type: Lithium-polymer Charge time: (10-80%): Approximately 40 minutes Fast charging: 1 day of battery life in 12 minutes Radio transceiver: Bluetooth® 5.0 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 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 Fitbit Versa 3 in a hot tub or sauna.  Materials Versa 3 includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminum watch case Heart Rate Like all heart rate tracking technologies, accuracy is affected by physiology, location of device and different movements.