PRODUCT OVERVIEW Meet Sense 2the smartwatch designed to help you stress less, sleep better & live healthier. Get help identifying stress and get the tools to better manage it. Learn more about your sleep and how to improve your rest with detailed nighttime tracking and a unique Sleep Profile. Track key heart-health indicators so you can make more informed wellness decisions. Plus Sense 2 is packed with advanced activity tracking and smartwatch features and includes 6 months of Fitbit Premium Membership1. Fitbit is part of the Google family. KEY FEATURES Learn to manage stress, sleep better and live healthier with Sense 2our most advanced health and fitness smartwatch
Manage stress and live healthier:   all-day stress detection with cEDA and daily Stress Management Score, ECG app for atrial fibrillation assessment (1), irregular heart rhythm notifications (2), SpO2 (3), health metrics dashboard (4), mindfulness content
Measure and improve sleep quality: personalized Sleep Profile (5), daily sleep stages & Sleep Score, smart wake alarm and do not disturb mode
Enhance activity: built-in GPS and workout intensity map, Daily Readiness Score (5), Active Zone Minutes, all-day activity tracking and 24/7 heart rate, 40+ exercise modes and automatic exercise tracking, water resistant to 50 meters
Designed for all-day wear: on-wrist Bluetooth calls, texts and phone notifications (6), customizable clock faces, Fitbit Pay (7), Amazon Alexa built-in (8), Google Wallet & Maps (Google Maps on Android only, coming Spring 2023 to iOS), 6+ day battery (9)

Learn more about Fitbit Sense 2

Model
Brand
Fitbit
Model
Sense 2
Part Number
FB521SRWT-US
Design
Color
Lunar White
Type
Smart Watch
Case Material
Aluminium
Band Material
Silicone
Band Length
Both small and large sizes included in box.
Small: Fits wrist 5.1 - 7 inches in circumference
Large: Fits wrist 6.5 - 8.6 inches in circumference
Display
Display Technology
AMOLED
Specification
Built-in Storage
Saves 7 days of detailed motion data, minute by minute
Battery
Battery Life
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.
Features
Specification
Requirements:

Google account will be required.

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:

Apple iOS 15 or higher.
Android OS 10 or higher. See additional tips for Android phones here.
Syncing range: Up to 30ft
Certain features like smartphone notifications may require Android 10+.
Syncing requires Bluetooth® LE, an internet connection and location permissions granted on the phone
Features
Multi-path optical heart rate sensor
Electrical sensor to measure skin conductance (cEDA) for body response tracking
Multipurpose electrical sensors compatible with ECG app & EDA app. ECG not available in all countries.
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.
Gyroscope
Altimeter
3-axis accelerometer
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.
Ambient light sensor
WiFi (deactivated, cannot be turned on)
NFC
Built-in GPS + GLONASS
Vibration motor
Speaker (75dB SPL @10cm)
Microphone
Dimensions & Weight
Height
Height: 0.44 in (11.2 mm)
Width
Width: 1.59 in (40.5 mm)
Depth
Length: 1.59 in (40.5 mm)
Weight
0.08 lb (37.64 g)
Package Contents
Package Content
Fitbit Sense 2
Classic band (small & large)
Charging cable
Shipping
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Return
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