--- product_id: 69633012 title: "Fitbit Flex Wireless Activity + Sleep Wristband, Slate" brand: "fitbit" price: "FREE" currency: GBP in_stock: false reviews_count: 10 url: https://www.desertcart.co.uk/products/69633012-fitbit-flex-wireless-activity-sleep-wristband-slate store_origin: GB region: Great Britain --- # 1 ATM water resistance Bluetooth 4.0 wireless sync 7-10 days battery life Fitbit Flex Wireless Activity + Sleep Wristband, Slate **Brand:** fitbit **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > ⌚ Track smarter, live better — don’t just keep up, lead the pack! ## Quick Answers - **What is this?** Fitbit Flex Wireless Activity + Sleep Wristband, Slate by fitbit - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/69633012-fitbit-flex-wireless-activity-sleep-wristband-slate) ## 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 on a single charge—stay powered through your goals. - • **Silent Vibrating Alarm:** Wake up refreshed without disturbing your partner, starting every day on the right foot. - • **Splash-Proof Durability:** Sweat, rain, and splash resistant to keep up with your busiest days without missing a beat. - • **Seamless Wireless Syncing:** Effortlessly connect to 150+ iOS, Android & Windows devices within 20 feet for real-time updates. - • **All-Day Activity & Sleep Tracking:** Monitor steps, distance, calories, active minutes, and sleep quality to optimize your lifestyle. ## Overview The Fitbit Flex Wireless Activity + Sleep Wristband is a sleek, lightweight fitness tracker that wirelessly syncs with over 150 leading smartphones and computers via Bluetooth 4.0. It tracks your daily steps, distance, calories burned, active minutes, and sleep quality, providing a comprehensive view of your health. Water-resistant up to 1 ATM, it withstands sweat and splashes, while its lithium-polymer battery offers up to 7-10 days of use per charge. The device features a silent vibrating alarm and LED progress indicators, making it an essential companion for busy professionals committed to optimizing their wellness. ## Description Make fitness a lifestyle with Fitbit Flex—a slim, stylish device that tracks all-day activity like steps, distance, calories burned and active minutes. See how every day stacks up with LEDs that light up like a scoreboard as you get closer to your goal. Then wear it at night to measure your sleep quality and wake with a silent, vibrating alarm. Day or night, Flex fits comfortably around your wrist, is water-resistant, and has a 5-day battery life. It also syncs to computers and 150+ leading smartphones, so you can access your stats anywhere and see your progress in charts and graphs. FREQUENTLY ASKED QUESTIONSWhat mobile devices are supported for syncing?The Fitbit Flex can sync directly to select iOS and Android devices. IOS: iPhone 4S, iPhone 5, 5S, 5C, iPod Touch (5th gen.), iPad 3, iPad 4, iPad mini. Android: Samsung Galaxy Note 10.1, Samsung Galaxy Note II, Samsung Galaxy S III, Samsung Galaxy S4How do I charge my flex?Your tracker battery lasts for about 5 days. To charge it, remove the tracker from the band and place it in the charger until all 5 lights are solid.If you are having trouble, your tracker's charging contacts may be obstructed by microscopic dirt or debris that prevents them from making a good connection to the charger. Use hand sanitizer and a tissue or dampen a cotton swab with rubbing alcohol and carefully clean the charging contacts on your tracker. Do not submerge your tracker in water or use abrasive cleaners. Thoroughly dry your tracker before attempting to charge. Be sure to fully seat your tracker into the charger, with the charging contacts fully inserted into the charging cable enclosure.How do I reset my tracker?lf your tracker is not responding, it may be fixed by restarting.1. Plug your charging cable into the USB port and insert your tracker into the charging cable. 2. Insert a paperclip into the small pinhole on the back of the charger. 3. Press on the pinhole for 3-4 seconds. Your Flex will now be reset. Take your tracker out of the charger and insert it back into the wristband.Can the wristband irritate my skin?The Flex wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. It does not contain latex. The clasp is made of surgical-grade stainless steel and contains traces of nickel. As with any type of jewelry, some people may experience allergies. Numerous factors can cause an allergy, such as a nickel sensitivity, reactions to bacteria that can accumulate in watch wristbands or other wearable devices, a reaction between the wristband and your soap or perspiration, or an allergy to the material of the wristband. If you notice any signs of skin irritation or experience any discomfort, please discontinue use. Review: Slimming World for free! - I call mine my consoince! My Husband bought me mine for Christmas, from Argos; and I have used it everyday. Being able to log everything I do and put in my mouth has led to me losing 15 lbs so far, and being able to get into the dress which I bought in a size smaller on purpose; in time for my Daughters wedding in August. Happy days Review: Most insane piece of kit!!! - The best ever!!! i was given it for a present and it was the easiest thing to set up!! It is like a nagging person to make you reach your goal!!!! awesome!!! definitely recommend this product!!! ## Features - One syncs automatically and wirelessly to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology. Syncing to 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00BGO0QEO | | ASIN | B00BGO0QEO | | Batteries | 1 Lithium Ion batteries required. (included) | | Best Sellers Rank | 226,805 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 11,253 in Sports Electronics & Gadgets | | Brand | Fitbit | | Customer Reviews | 4.1 4.1 out of 5 stars (18,591) | | Customer reviews | 4.1 4.1 out of 5 stars (18,591) | | Date First Available | 6 May 2013 | | Department | womens | | Is discontinued by manufacturer | No | | Item model number | FB401SL | | Manufacturer | Fitbit | | Product Dimensions | 1.52 x 0.95 x 20.83 cm; 11.34 g | | Units | 1 Count | ## Images ![Fitbit Flex Wireless Activity + Sleep Wristband, Slate - Image 1](https://m.media-amazon.com/images/I/51qrk3-c-lL.jpg) ![Fitbit Flex Wireless Activity + Sleep Wristband, Slate - Image 2](https://m.media-amazon.com/images/I/61Xd7Kp6Z3L.jpg) ![Fitbit Flex Wireless Activity + Sleep Wristband, Slate - Image 3](https://m.media-amazon.com/images/I/61Q3Lf5oEVL.jpg) ![Fitbit Flex Wireless Activity + Sleep Wristband, Slate - Image 4](https://m.media-amazon.com/images/I/61rptPSEvzL.jpg) ![Fitbit Flex Wireless Activity + Sleep Wristband, Slate - Image 5](https://m.media-amazon.com/images/I/91zoPy4bcEL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Slimming World for free! *by K***. on 26 May 2016* I call mine my consoince! My Husband bought me mine for Christmas, from Argos; and I have used it everyday. Being able to log everything I do and put in my mouth has led to me losing 15 lbs so far, and being able to get into the dress which I bought in a size smaller on purpose; in time for my Daughters wedding in August. Happy days ### ⭐⭐⭐⭐⭐ Most insane piece of kit!!! *by C***E on 10 November 2015* The best ever!!! i was given it for a present and it was the easiest thing to set up!! It is like a nagging person to make you reach your goal!!!! awesome!!! definitely recommend this product!!! ### ⭐⭐⭐ Useful product but does not sync *by L***E on 1 October 2020* I've used Fitbits in the past and have found it easy to monitor my steps, log my calorie intake and monitor my health. But with this particular i have issues with it trying to sync.. It does not sync daily and i cannot understand what my calorie intake should be.. I've googled the issue but still the same outcome. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/69633012-fitbit-flex-wireless-activity-sleep-wristband-slate](https://www.desertcart.co.uk/products/69633012-fitbit-flex-wireless-activity-sleep-wristband-slate) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-22*