| Introduction Time | 2019, September | April 30, 2021 |
|---|---|---|
| Availability Status | Available. Released November 2019 | Available, released May 20, 2021 |
| Size and Dimensions | 40 * 40 * 11 millimeter (mm) | 35.7 x 25.8 x 12.2 mm |
|---|---|---|
| Product Weight | - | 38 gram (g) |
| Compatible SIM Card Types | No | No |
|---|---|---|
| Other Body Features | Aluminum body / Water resistant up to 1 meter deep / Silicone band | IP68 certified for water and dust resistance (up to 1.5 meters) |
| Display Technology | AMOLED / Square | |
|---|---|---|
| Screen Size | 1.3 inch | 1.4 inch |
| Display Resolution | ||
| Screen protector type | Gorilla Glass 3 | - |
| Display Technical Details | Color touchscreen | 600 nits peak brightness |
| OS Version | Fitbit proprietary OS / Compatible with Android and iOS | Proprietary OS compatible with Android and iOS |
|---|
| Internal Memory Capacity | Storage capacity for over 300 music tracks | - |
|---|
| Battery Type and Capacity | Lithium Polymer | Non-removable 315 mAh Li-Ion battery |
|---|---|---|
| Battery Standby Time |
| Smart Sensors | Accelerometer, Compass, Pedometer, Heart rate counter, Altimeter | Accelerometer sensor, Optical heart rate sensor with SpO2 (blood oxygen level) calculation capability |
|---|---|---|
| Other Features and Capabilities | Amazon Alexa voice assistant | - |
| Messaging Method | - | Received notification alerts / Display text messages |
| Communication Technologies | No | No cellular connectivity |
|---|
| Bluetooth Support | Yes, Version 4.0 | 5.0, A2DP, LE |
|---|---|---|
| GPS Support | Yes | No |
| NFC Support | Yes | No |
| Wireless Network Type | - | No |
| USB Connections Type | - | No, charges via proprietary charging dock |
| Available Color Options | Black | Black |
|---|---|---|
| Global Price Range | - |
| Speaker Type | - | No |
|---|
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