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| Item number: CIEN3-100772148 Manufacturer no.: FB521GLBM EAN/GTIN: 810038858388 |
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![](/p.gif) | More information: Weight & dimensions | Width | 40.5 mm | ![](/p.gif) | Depth | 40.5 mm | ![](/p.gif) | Thickness | 12.3 mm | Network | GPS (satellite) | Yes | ![](/p.gif) | GLONASS | Yes | Operational conditions | Operating temperature (T-T) | -10 - 45 °C | Ports & interfaces | Bluetooth version | 5.0 | ![](/p.gif) | Near Field Communication (NFC) | Yes | ![](/p.gif) | Headphone connectivity | Bluetooth | ![](/p.gif) | Bluetooth | Yes | ![](/p.gif) | Bluetooth Low Energy (BLE) | Yes | Performance | Built-in microphone | Yes | ![](/p.gif) | Built-in speaker(s) | Yes | ![](/p.gif) | Mobile operating systems supported | Android, iOS | ![](/p.gif) | Operating system installed | Fitbit OS | Display | Display type | Digital | ![](/p.gif) | Touchscreen | Yes | ![](/p.gif) | Always-on display | Yes | ![](/p.gif) | Colour display | Yes | Design | Market positioning | Smartwatch | ![](/p.gif) | Watch case colour | Gold | ![](/p.gif) | Watch case material | Aluminium | ![](/p.gif) | Band colour | White | ![](/p.gif) | Band size | S/L | ![](/p.gif) | Shape | Square | ![](/p.gif) | Wrist size range | 129 - 209 mm | ![](/p.gif) | Minimum strap length | 129 mm | ![](/p.gif) | Maximum strap length | 209 mm | ![](/p.gif) | Suggested gender | Unisex | ![](/p.gif) | Waterproof | Yes | ![](/p.gif) | Closure type | Single prong strap buckle | ![](/p.gif) | Protection features | Water resistant | ![](/p.gif) | Removable strap | Yes | ![](/p.gif) | Waterproof up to | 50 m | Power | Battery type | Built-in battery | ![](/p.gif) | Battery technology | Lithium Polymer (LiPo) | ![](/p.gif) | Battery life (max) | 144 h | ![](/p.gif) | Battery life | 6 day(s) | ![](/p.gif) | Battery life (GPS mode) | 5 h | ![](/p.gif) | Battery life | 144 h | ![](/p.gif) | Charging time | 2 h | Features | Heart rate monitor | Yes | ![](/p.gif) | Heart rate sensor type | Optical | ![](/p.gif) | Blood pressure monitor | Yes | ![](/p.gif) | Blood oxygen sensor | Yes | ![](/p.gif) | Distance travelled | Yes | ![](/p.gif) | Calories burned | Yes | ![](/p.gif) | Accelerometer | Yes | ![](/p.gif) | Activity tracker | Yes | ![](/p.gif) | Quality of sleep | Yes | ![](/p.gif) | Short Message Service (SMS) | Yes | ![](/p.gif) | Vibrating motor | Yes | ![](/p.gif) | Ambient light sensor | Yes | ![](/p.gif) | Virtual assistant | Amazon Alexa | ![](/p.gif) | Smart notifications | Yes | ![](/p.gif) | Answerphone remote access | Yes | ![](/p.gif) | SMS notifications | Yes | ![](/p.gif) | Skin temperature sensor | Yes | ![](/p.gif) | Alarm clock | Yes | ![](/p.gif) | Advanced workouts | Yes | ![](/p.gif) | Automatic daily activity detection | Yes | ![](/p.gif) | Find my phone function | Yes | ![](/p.gif) | Workout tracking | Yes | ![](/p.gif) | Call notifications | Yes | ![](/p.gif) | Thermometer | Yes | ![](/p.gif) | Altimeter | Yes | ![](/p.gif) | Vibrating alarm clock | Yes | Packaging content | Charger | Yes |
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