SKU: 79150233762

Life Smartwatch

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Description

Life SmartwatchBracelet operation instructions 1Bracelet function page 1. 1 time 1. 2 Pedometer 1. 3 Sleep monitoring 1. 4 Pedometer Distance 1. 5 Calorie 1. 6 Healthy 1. 7 Physical exercise 1. 8 Blood oxygen 1. 9 blood pressure 1. 10 Message reminder 1. 11 Camera control 1. 12 Others 2, Configuration description hip: NRF51802 Bluetooth: Bluetooth 4. 0 Screen size: Color screen 0. 96 inches Screen pixels: 80*160 Compatible system: above Android4. 0, above iso7. 0\

Bracelet operation instructions


1.Bracelet function page

 1.1 time

 1.2 Pedometer    

 1.3 Sleep monitoring

1.4 Pedometer Distance

 1.5 Calorie

 1.6 Healthy

 1.7 Physical exercise

1.8 Blood oxygen

 1.9 blood pressure

1.10 Message reminder

1.11 Camera control

1.12 Others


 2, Configuration description

hip: NRF51802               Bluetooth: Bluetooth 4.0

 Screen size: Color screen 0.96 inches     Screen pixels: 80*160

Compatible system: above Android4.0, above iso7.0\

 Standby time: routine standby for 15 days, 5---7 days in use

3、Brief operation of hand ring

3.1 Touch function   

        

Wake up the screen according to the graphical position; switch different functional interfaces in turn. 

3.2 Charge

☆ The charging clamp can be clamped on the main engine to charge normally.       

☆ When the bracelet is charged, the battery power grid scrolls to display. When the battery is full, the battery symbol on the screen shows full grid. 

3.3 Health data 

   In the movement interface, long press touch to enter the movement mode, which is divided into running, riding, jogging, swimming, football, basketball, jumping rope, badminton mode; in the heart rate interface, long press touch to enter the test mode, the heart rate, blood pressure and blood oxygen mode are the same; in the information interface, long press touch to enter the information viewing; More interfaces, long touch, access to the lower menu; after the successful connection between the hand ring and APK Bluetooth, the hand ring end pacing/sleep/heart rate data will automatically synchronize to the mobile phone in real time, and the APK home page interface can synchronize the power of the hand ring end.  

☆Sleep: Sleep monitoring can be done from 9 p.m. to 9 a.m., but not during other periods.

3.4 More 

   In more interfaces, long-press touch, access options (about stopwatch, two-dimensional code, reset, shutdown, etc.): in the reset interface, long-press touch, can restore factory settings; in the shutdown interface, long-press touch, shutdown; on, options can view version and Bluetooth address; in the two-dimensional code interface, long-press touch, two-dimensional code pop-up, mobile phones can scan and download APP.

3.5 Bluetooth connection

 3.5.1Da Fit down load

1、Download through the application market:

Android: application treasure, pea pod and other application market search Da Fit to download

IOS side: App Store search Da Fit to download

1. Download by QR code:


Android: WeChat or other applications, and the link jumps to the download interface to download;

IOS side: WeChat or other applications, and choose to jump to the download interface to download via qq browser or local Safari browser link.

Android phone app name:Da Fit     Apple mobile APP name:Da Fit

Installation completion icon as shown:

             

3.5.2 log in

Open Da Fit, as shown below:

 

3.5.3 Bluetooth connection

☆After the bracelet is turned on, Bluetooth is always searched. Go to the Da Fit page, click More Options, click Connect Device, click Search, select the name of the device you want to connect to, and click Connect to connect successfully.

☆After the Bluetooth connection is successful, the time of the bracelet is synchronized with the time of the mobile phone. The APK clicks to find the bracelet, and the bracelet vibrates and displays the prompt icon.

☆ Bluetooth auto reconnection:

1. There is no reminder beyond the Bluetooth connection range. When the bracelet reaches the Bluetooth connection range, the APK will be automatically reconnected when the Bluetooth is connected.

2. Close the application background or restart the phone or click the one-button cleaning that comes with the phone, and enter Da Fit again. Within the valid range of Bluetooth connection, Bluetooth will automatically reconnect.

 4. Other functions

 The following functions can be implemented only after successfully logging in to the apk and the Bluetooth connection is successful.

 4.1 Notice

Including call notification, SMS notification, message notification, WeChat message notification (Example: Turn on call notification in the setting, when the mobile phone receives an incoming call, the wristband vibrates and the screen prompts, the interface will display the caller icon, click the touch button Stop reminding).

 4.2 Do not disturb mode

 When the Do Not Disturb mode is turned on, all notification notifications that are turned on in the setting except the alarm clock will no longer have an automatic bright screen vibration reminder on the wristband end.

 4.3 Sedentary reminder

  Set the start to end time period and sedentary time interval (minutes), threshold (steps), click to enter the repeat setting to select the sedentary reminder date (week), when the sedentary time arrives, the bracelet end brightly vibrates and displays a reminder icon.

4.4 Alarm reminder

 The APK side clicks the alarm reminder setting to add the alarm time. When the alarm time arrives, the bracelet end vibrates and the screen prompts and displays the alarm icon.

4.5 Reminder mode:

☆ Bright screen: When the mobile phone APK side sets the alarm time to arrive or receives the push message, the wristband end only displays the bright screen reminder;

☆Vibration: When the mobile phone APK sets the alarm time to arrive or receives the push message, only the vibration reminder appears on the wrist end;

☆ Bright screen + vibration: When the mobile phone APK side sets the alarm time to arrive or receives the push message, the wrist ring displays bright screen + vibration reminder;

4.6 Gesture Intelligence:

Select the wearing method (left hand / right hand) and wear the bracelet on the selected hand (left hand / right hand);

☆ Raise the hand to brighten the screen: Turn on the hand to brighten the screen, raise the hand so that the bracelet is tilted inward toward the front of the hand, and the wristband end displays a bright screen;

☆ Turning the wrist screen: Turn on the wrist and brighten the screen. The 90-degree flip makes the wristband tilt inward toward the front of the wrist, and the wristband displays a bright screen.


4.7 Unbinding the device:

Open Da Fit, in the “More” interface, click “Connect Device” will pop up “Current Device” “Disconnected from Current Device”, click, it will appear whether to disconnect Bluetooth, select “OK” to unbind ( Under the premise of successful Bluetooth connection). Synchronize to the Bluetooth device in the system settings.          

Precautions:

1. Android4.4 or iOS 8.0 and above devices that support Bluetooth 4.0;

2. When using for the first time, please connect the charger to activate the bracelet;

3, Bluetooth connection:

A Please make sure that the Bluetooth of the mobile phone is turned on and the wristband is turned on.

B When searching for Bluetooth, please make sure that the bracelet is not bound by other accounts;

When C searches for Bluetooth, the bracelet and the mobile phone are as close as possible.     

4. If the hand ring does not receive the push message, please confirm that Dafit is running in the background, and the message notification is on (the auxiliary function also needs to be turned on);

5. If the exercise, sleep, and heart rate data are not synced to the APK, try disconnecting the Bluetooth and reconnecting.

6. Before binding the bracelet to another account, you need to unbind it with the current account.

7. If the bracelet cannot be illuminated, connect the bracelet to the charger.

8. Press and hold the dial to enter the bracelet information page, and press and hold the bracelet again to shut down.

The product instruction manual contains product functions, usage methods and operation procedures. Please read carefully to achieve the best results and prevent unnecessary damage. Please do not arbitrarily change the accessories of the product and disassemble it yourself, resulting in out of warranty. The box contains 1 smart wrist watch, 1 charger, and 1 product manual.


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SKU: 79150233762

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S Navin
Dallas, US
★★★★★ 5
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Format: Paperback, Format: Paperback
Linux Kernel Programming - Second Edition: A Comprehensive and Practical Guide to Kernel Internals, Writing Modules, and Kernel Synchronization is an outstanding resource for anyone eager to understand the inner workings of the Linux kernel. Whether you're a beginner looking to get started or an experienced developer aiming to deepen your knowledge, this book delivers a well-structured and hands-on approach to kernel programming. The book starts with the fundamentals—setting up a kernel development environment, understanding kernel release nomenclature, and compiling the 6.x Linux kernel from source. As you progress, it dives into advanced topics such as kernel configuration, writing and debugging loadable kernel modules (LKMs), kernel synchronization mechanisms, memory management, CPU scheduling, and much more. Each chapter builds on practical examples, ensuring that readers not only understand the theory but also learn how to apply it in real-world scenarios. One of the book's biggest strengths is its focus on practical application. From exploring the kernel build process and bootloader configurations to working with Git for kernel development and troubleshooting system crashes using debugging tools, the book provides step-by-step guidance. The coverage of kernel synchronization techniques—including spinlocks, mutexes, and RCU—makes it an invaluable reference for those dealing with concurrent programming in the kernel space. Whether you're an aspiring kernel developer, a DevOps engineer, or a systems programmer, this book is a must-have. The clear explanations, well-structured content, and hands-on exercises make it a perfect companion for anyone wanting to go from a beginner to an expert in Linux kernel programming. Highly recommended for anyone serious about understanding and working with the Linux kernel!
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Reviewed in the United States on January 29, 2025
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Cliente Kindle
Louisville, US
★★★★★ 5
Broad, detailed and comprehensible book on Linux Kernel Programming
Format: Paperback, Format: Paperback
I got on my desk a copy of "Linux Kernel Programmin (2E)" by Kaiwan N. Billimoria and will shortly mention what this book is about. It is a book that you can read cover-to-cover to have a better understanding of kernel development, but I see also how it can be used as a reference when you are going to throw C code at your compiler and build a linux kernel. There is a number of scenario why you might want to do that: - You are recompiling the kernel for a new machine that needs better support - You are going to implement a kernel module and you need some context - You are going to work on the kernel yourself While all of those use-cases for the book are technically a fit, apart from gaining some higher understanding I see the most out of it if you are going to code on the kernel itself. There you have everything that is needed. You can go back and forth between your code and the book, and still learn by doing. What mostly impressed me is the breath of the topics: the chapter about writing a config file for the kernel enlists a total of seven (7!) different strategies to get started with a configuration file for your kernel. Also a lot of side tools are mentioned to help out with kernel development and debugging. Quite some module development can be in theory done without fully understanding the details of the kernel itself, but the deeper you reach, the more you will need the details that are well discussed in the book. Memory allocation, CPU scheduling algorithms, the book does not try to save words and describe in detail and plain language most things there is to know, not sparing plenty of references to other books and articles. Also, the material is up-to-date with the latest kernel.
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Reviewed in the United States on March 8, 2024
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Sergio Prado
San Leandro, US
★★★★★ 5
For begginers and also experienced kernel developers!
Format: Paperback
There are a few aspects about the book that I really like. One is that every chapter provides a very detailed and immersive look into a specific part of kernel development. Another interesting aspect about the book is that it is based on a very recent kernel version (6.1), which is also an LTS version that will be maintained for a few years. I am not aware of any other book about the Linux kernel based on such a recent version. The first 3 chapters of the book explains how to configure and build the Linux kernel (both natively for x86_64 and cross-compiling for AArch64). After that, chapters 4 and 5 explains all you need to know about how to write kernel modules. And starting from chapter 6, the book introduces different aspects of kernel programming in very detail, from the scheduler to memory management and synchronization. Get ready, because it is indeed a big book, with more than 800+ pages! I really think the book targets both beginners and experts. For beginners, it will be a deep dive into major kernel programming concepts (make sure you follow along the exercises proposed by the author). For experienced kernel developers, the book is really a refresher. Though I work with the Linux kernel for 15+ years, I can still learn a lot by reading the book. An old dog can always learn new tricks, right?
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Reviewed in the United States on May 30, 2024
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princesscoldheart
Los Angeles, US
★★★★★ 5
Organized well. You can read it section by section. Fantastic information. Clearly presented.
I like this book better than "what to expect" because this one does a better job of what you'll ACTUALLY expect versus telling you the throngs of horrible things that could happen to you or your baby. I'd rather be informed than mentally prodded with scary information. On one hand, it's good to know what could happen, so the other books you've probably already ordered are good to skim through, but this book I recommend reading all the way through. Easy to read, you'll actually have TIME to read it because you can read the age your baby is instead of a book that's all mixed up and organized by diseases and threats. Clear photos and explanations and tips on how to make your life and baby's life easier and better. I've understood my baby's needs better because of this book. I feel really glad I got it because it was the only book that really helped my daily life with my newborn.
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Reviewed in the United States on November 21, 2013
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thibault rosazza
Phoenix, US
★★★★★ 5
Useful
Format: Hardcover
Comprehensive book from 0 to 1 year. This book provide good tips and tricks on how to raise and take care of your newborn. Well designed, we come back to it time to times to get some help and support.
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Reviewed in the United States on September 18, 2025

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