--- product_id: 155574354 title: "NextStern M4 Touchscreen Smart Fitness Activity Tracker Watch Band with Heart Rate Monitor Like Steps and Calorie Counter, Blood Pressure (Black)" brand: "nextstern" price: "FREE" currency: XOF in_stock: false reviews_count: 8 url: https://www.desertcart.sn/products/155574354-nextstern-m4-touchscreen-smart-fitness-activity-tracker-watch-band-heart store_origin: SN region: Senegal --- # NextStern M4 Touchscreen Smart Fitness Activity Tracker Watch Band with Heart Rate Monitor Like Steps and Calorie Counter, Blood Pressure (Black) **Brand:** nextstern **Price:** FREE **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** NextStern M4 Touchscreen Smart Fitness Activity Tracker Watch Band with Heart Rate Monitor Like Steps and Calorie Counter, Blood Pressure (Black) by nextstern - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/155574354-nextstern-m4-touchscreen-smart-fitness-activity-tracker-watch-band-heart) ## Best For - nextstern enthusiasts ## Why This Product - Trusted nextstern brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description HOW TO USE 1. Please charge before use! After charging, the watch will automatically turn on! 2. After the watch is connected to the phone, the watch will automatically update to the time of the phone, the watch does not need to be set! 3. Do not use the smart bracelet in sea water, hot water or warm water! 4. Please scan the QR code on the user manual to download the app. How to connect the phone to the watch (1). Please download the mobile app (2). Start the watch,Start the phone Bluetooth (3). Enter the mobile app to find the Bluetooth connection device function (4). Connect the watch to your phone mobile app (5). After connecting, the watch can monitor various sports data normall M4 Fitness Smart band: If you're a fitness freak and love keeping a track of the calories burnt, sleep cycle, and heart rate, and then the M4 Smart Band is what you need. This smart band works as a heart rate tracker, fitness watch, and an activity tracker. M4 waterproof Smart fitness Band compatible with Bluetooth or Heart Rate Sensor. It is compatible to devices having Bluetooth version 4.0 and below in smartphones, Tablets and PC's and also support Android. Functions: 1.Heart Rate Monitor 2.Sedentary reminder 3.Calories 4.Time 5.Alarm 6.Anti-lost 7.Distance calculation 8.Step Monitor 10.Call Alert 11.Wrist sense Pre-requisites for use: Your mobile phone Bluetooth version must be Bluetooth 4.0 or higher Android version must be Android 4.3 or above. Working: To connect the smart band to mobile phone, you need to connect the current mobile successfully via Bluetooth. ## Features - IF YOU ARE LOOKING TO BUY THE AUTHENTIC ONE : ONLY SELECT THE SELLER NextStern Technology from the seller options ONLY NEXTSTERN WILL PROVIDE THE ORIGINAL PRODUCT Please Look Over Product Description Below for all the instructions related to installation of the Application - ☑️ Function: Blood pressure, heart rate , Blood Oxygen Monitors, Pedometer, Calories, Distance, Stopwatch, Sleep quality measurement, Call reminder, Alarm clock, Message calls notifications, Sedentary reminder, Remote camera control, Anti-lost, find the phone/bracelet, Water drinking reminder, Sedentary reminder, Social sharing (WeChat, Facebook, Twitter, Skype) - ☑️ Calls/text reminder: It will vibrate to alert you if your phone receives a phone call, text, SNS; You will never miss a call and a message; Sedentary reminder, when you focus on your work too long, it gives you a notice to relax - ☑️ All-day activity tracking: Track steps, distance, calories burned, active minutes, you can check daily activity and time on OLED display or APP - ☑️ HD Display Screen and Long Standby Time: High sensitive capacitive touch screen; 0.96-inch TFT HD LCD touch screen, there have four different operation interface for you to change, Resolution ratio: 128x64 pixel; 380MAH polymer lithium battery, standby time up to 180 hours after 1.5 hours fully charged - ›See more product details ## Images ![NextStern M4 Touchscreen Smart Fitness Activity Tracker Watch Band with Heart Rate Monitor Like Steps and Calorie Counter, Blood Pressure (Black) - Image 1](https://m.media-amazon.com/images/I/61O1uhWyZsL.jpg) ![NextStern M4 Touchscreen Smart Fitness Activity Tracker Watch Band with Heart Rate Monitor Like Steps and Calorie Counter, Blood Pressure (Black) - Image 2](https://m.media-amazon.com/images/I/61fcJCKHOTL.jpg) ## Customer Reviews ### ⭐ Fake *by K***A on Reviewed in India on 9 September 2020* Don't even worth 1 🌟 ### ⭐ Dead unit delivered *by A***A on Reviewed in India on 1 October 2019* The shipped unit is dead. I had tried charging it up with the given charger but it never turns on. Even after few hours of charging, power never comes up and it remains dead always. ### ⭐⭐⭐⭐ M4 copy but really good copy!!!! *by A***K on Reviewed in India on 24 September 2019* M4 band in this price is good and the product is not very cheap overall good product with good material..I pay money online and product was sent to me 6th day and product package was really very good.. --- ## 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.sn/products/155574354-nextstern-m4-touchscreen-smart-fitness-activity-tracker-watch-band-heart](https://www.desertcart.sn/products/155574354-nextstern-m4-touchscreen-smart-fitness-activity-tracker-watch-band-heart) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-07-17*