---
product_id: 257050
title: "Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large"
brand: "fitbit"
price: "฿10853"
currency: THB
in_stock: true
category: "Fitbit"
url: https://www.desertcart.co.th/products/257050-fitbit-flex-wireless-activity-sleep-wristband-black-small-large
store_origin: TH
region: Thailand
---

# Water-resistant up to 1 ATM Bluetooth 4.0 wireless sync 7-10 days battery life Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large

**Brand:** fitbit
**Price:** ฿10853
**Availability:** ✅ In Stock

## Summary

> ⌚ Elevate your fitness game—track smarter, live better!

## Quick Answers

- **What is this?** Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large by fitbit
- **How much does it cost?** ฿10853 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/257050-fitbit-flex-wireless-activity-sleep-wristband-black-small-large)

## Best For

- fitbit enthusiasts

## Why This Product

- Trusted fitbit brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Battery:** Up to 10 days of uninterrupted tracking means less charging and more moving.
- • **Splash-Proof Durability:** Sweat, rain, and splash resistant design keeps up with your busiest days without missing a beat.
- • **Discreet, Stylish Comfort:** Slim, lightweight wristband with LED goal indicators fits your lifestyle and wardrobe seamlessly.
- • **Seamless Wireless Syncing:** Effortlessly connect to 150+ iOS, Android & Windows devices within 20 feet for real-time progress updates.
- • **All-Day Activity & Sleep Tracking:** Monitor steps, distance, calories, active minutes, and sleep quality to optimize your wellness routine.

## Overview

The Fitbit Flex Wireless Activity + Sleep Wristband is a sleek, water-resistant fitness tracker that wirelessly syncs with over 150 leading smartphones and computers via Bluetooth 4.0. It tracks daily activity metrics and sleep quality, features a battery life lasting up to 10 days, and offers a comfortable, stylish design with LED progress indicators to keep you motivated around the clock.

## Description

Product Description Never stop moving with Fitbit Flex. Wear this slim, stylish device all the time and get the motivation you need to get out and be more active. It tracks steps, distance, and calories burned and shows you how you’re stacking up against your daily goals. At night, it tracks your sleep cycle, helps you learn how to sleep better, and wakes you silently in the morning. Access your stats anytime on your computer, tablet or from leading smartphones – both iPhone and Android. Flex is your perfect companion, it’s with you everywhere… even in the shower. Plus, it looks good no matter what you’re wearing. From the Manufacturer • Certain features like Auto Sleep Tracking and SmartTrack may be disabled when using this accessory. Classic accessory bands are the recommended accessory for high intensity workouts and sleep tracking. • Do not wear the Flex 2 Pendant accessory while sleeping or during high intensity activity, as doing so could create a choking hazard. • Flex 2 Pendant accessories contain magnets. Magnets may interfere with pacemakers, defibrillators, or other medical devices. Consult your physician and the manufacturer of your medical device before using to determine if these accessories are safe for you. If the accessories may be interfering with your pacemaker, defibrillator, or other medical device, do not wear the accessories. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Buying Guide Move it up: Since blood increases further up your arm, wear your tracker higher on your wrist to improve the heart rate signal during workouts. Start by moving the device up to three finger widths above your wrist bone, then experiment with slightly lower placement. Keep it secure: The less your tracker moves during exercise, the more chance you have of maintaining a heart rate signal throughout the activity. Do not wear the band too tightly, as this can restrict blood flow and goes against our wear and care guidelines. Hold steady for ten seconds: High intensity exercises or activities that cause you to keep your wrist bent (like push-ups) or move your arms vigorously (like dance) may interfere with heart rate signals. If you stop seeing a signal during these types of activities, hold your wrist steady for ten seconds during breaks to get your reading. Manufacturer Contact Information Customers contact: support@fitbit.com See more

## Features

- Rubber
- Made in USA or Imported
- One syncs automatically and wireless to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology. Syncing two computers requires Internet connection and USB port. Syncing to mobile devices requires Bluetooth and Internet connection. Syncing range: 20 feet. Call notifications via Bluetooth 4.0
- Water Resistance: Charge has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking charge off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean
- Warning: Do not use if you have a pacemaker or other internal, or implanted medical device. Not intended for use by children under 13. Always consult your physician. Slippery when wet
- We recommend charging your device every few days to ensure you are always tracking. Charge time: One to two hours. Battery life: up to 7 - 10 days. Battery type: Lithium-polymer
- Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices
- Tracks steps, distance, calories burned and active minutes
- Monitor how long and well you sleep
- Wakes you (and not your partner) with a silent wake alarm
- LED lights show how your day is stacking up against your goal
- Slim, comfortable and easy to wear (sold with both large and small wristbands included with an interchangeable clasp)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00BGO0Q9O |
| ASIN  | B00BGO0Q9O |
| Additional Features | Activity Tracker, pedometer, sleep_monitor |
| Age Range Description | Adult |
| Band Color | black |
| Band Material Type | Silicone |
| Batteries  | Lithium Metal batteries required. (included) |
| Battery Average Life | 48 Hours |
| Battery Capacity | 330 Amp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 1.5 Hours |
| Best Sellers Rank | #798,861 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2,627 in Activity & Fitness Trackers |
| Brand | Fitbit |
| Built-In Media | Wristbands (large and small) and interchangeable clasp |
| Case Material Type | Plastic |
| Clasp Type | Deployant Clasp |
| Color | Black |
| Communication Feature | Bluetooth, USB |
| Compatible Devices | Samsung Galaxy Note 10.1, Samsung Galaxy Note II, Samsung Galaxy S III, Samsung Galaxy S4, iPad 3, iPad 4, iPad mini, iPhone 4S and up, iPod Touch (5th generation) |
| Compatible Phone Models | [iPhone 4S and up, Samsung Galaxy S4, Samsung Galaxy S III, Samsung Galaxy Note II] |
| Connectivity Technology | Bluetooth, USB |
| Controller Type | IOS |
| Customer Reviews | 3.9 3.9 out of 5 stars (22,337) |
| Date First Available  | March 11, 2013 |
| Department  | unisex-adult |
| Display Type | LED |
| External Testing Certification | FCC, CE, R&TTE |
| GPS Geotagging Functionality | No GPS |
| Global Trade Identification Number | 00713524579838, 00810351024606, 00898628002649 |
| Human Interface Input | Touchscreen |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions | 0.6 x 0.38 x 8.2 inches |
| Item Weight | 0.2 Pounds |
| Item model number  | RZS-000-01 |
| Manufacturer | Fitbit Inc |
| Manufacturer  | Fitbit Inc |
| Manufacturer Contact Information | Customers contact: support@fitbit.com |
| Metrics Measured | accelerometer |
| Model Name | flex |
| Model Number | RZS-000-01 |
| Operating System | Android, Apple_iOS, Apple_iOS, Android, Windows, Windows |
| Product Dimensions  | 0.6 x 0.38 x 8.2 inches; 3.2 ounces |
| Screen Size | 1.04 Inches |
| Shape | Rectangular |
| Sport Type | Running, exercise_&_fitness, exercise_&_fitness, outdoor lifestyle, running, outdoor lifestyle |
| Style Name | Size S |
| Supported Application | Alarm, Pedometer, calorie_tracker, distance_tracking |
| Target Audience | Unisex Adults |
| UPC | 713524579838 745750683690 898628002649 810351020691 043396312937 810351024798 810351024606 810351020295 898628002663 656107328419 603470069609 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year parts and labor |
| Warranty Type | Standard/Full warranty |
| Water Resistance Depth | 10 Meters |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IPX4 |
| Wearable Computer Type | Activity Tracker |
| Wireless Compability | Bluetooth |
| Wireless Provider | Unlocked |

## Product Details

- **Battery Capacity:** 330 Amp Hours
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** Fitbit
- **Connectivity Technology:** Bluetooth, USB
- **GPS:** No GPS
- **Operating System:** Android, Apple_iOS, Apple_iOS, Android, Windows, Windows
- **Screen Size:** 1.04 Inches
- **Shape:** Rectangular
- **Special Feature:** Activity Tracker, pedometer, sleep_monitor
- **Wireless Communication Standard:** Bluetooth

## Images

![Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large - Image 1](https://m.media-amazon.com/images/I/51N0Y6osPIL.jpg)
![Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large - Image 2](https://m.media-amazon.com/images/I/616PeicQKhL.jpg)
![Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large - Image 3](https://m.media-amazon.com/images/I/61WBQ16TK7L.jpg)
![Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large - Image 4](https://m.media-amazon.com/images/I/51MIld9nDYL.jpg)
![Fitbit Flex Wireless Activity + Sleep Wristband, Black, Small/Large - Image 5](https://m.media-amazon.com/images/I/81r0Fl0SWGL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Frequently Bought Together

- Fitbit Flex Wireless Activity + Sleep Wristband, Slate, Small/Large
- Fitbit Inspire 3 Health &-Fitness-Tracker with Stress Management, Workout Intensity, Sleep Tracking, 24/7 Heart Rate and more, Midnight Zen/Black One Size (S & L Bands Included)
- Fitbit Aria Air Smart Scale, Black

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**Shop now:** [https://www.desertcart.co.th/products/257050-fitbit-flex-wireless-activity-sleep-wristband-black-small-large](https://www.desertcart.co.th/products/257050-fitbit-flex-wireless-activity-sleep-wristband-black-small-large)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-06-30*