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D21 Bluetooth 4.0 Heart Rate Monitor Smart Bracelet Watch

 -  BLACK 173192704

Sleep Monitoring Heart Rate Monitor Sedentary Alert Calorie Burning Distance Measurement for Sports

Dispatch: Ships on Dec 8

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D21 Bluetooth 4.0 Smart Bracelet Watch
  • Description
  • Product FAQ
  • Customer Reviews
  • Shipping & Payment
  • Wholesale Inquiry

Main Features:
nRF51822 chip and Bluetooth 4.0 technology: Adopt nRF51822 chip and Bluetooth 4.0 technology that it can quickly and efficiently meet the needs of your life.
Heart rate monitor: Give you the accurate real-time feedback, let you keep fit easily.
Sleep monitor / Sedentary reminder / Pedometer: Take care of your health, monitor your sleep, remind you to have a rest and track your sports.
Distance measurement: Measure your daily walking distance precisely.
Calorie consumption management: Calculate the consumption of calorie, record the daily burned calorie.
Call / SMS reminder: When a call or message is coming, you can check it without taking out of your mobile phone.

Specification

Hardware

Built-in chip type: NRF51822
Bluetooth version: Bluetooth 4.0
Waterproof: Yes
IP rating: Life water resistance

Functions

Bluetooth calling: Phone call reminder
Messaging: Message reminder
Health tracker: Heart rate monitor,Pedometer,Sedentary reminder,Sleep monitor
Alert type: Ring,Vibration
Other function: Alarm

Screen

Screen: OLED
Screen resolution: 64 x 48
Screen size: 0.66 inch
Operating mode: Touch Screen

Battery

Type of battery: Polymer battery
Battery Capacty: 80mAh
Charging time: About 60mins
Standby time: 3-4 days

General

People: Female table,Male table

Dial and Band

Shape of the dial: Rectangle
Case material: Stainless Steel
Band material: Silicone

Features

Compatible OS: Android,IOS
Compatability: Android 4.3, iOS 7.0 and above system
Language: English,Simplified Chinese,Traditional Chinese
Available color: Black,Pink,Purple,White

Weight and Size

Dial size: 4.53 x 2.40 x 1.23 cm / 1.78 x 0.94 x 0.48 inches
Band size: 12.50 x 0.95 cm / 4.92 x 0.37 inches
Product size (L x W x H): 12.50 x 2.40 x 1.23 cm / 4.92 x 0.94 x 0.48 inches
Package size (L x W x H): 15.40 x 8.80 x 3.10 cm / 6.06 x 3.46 x 1.22 inches
Product weight: 0.030 kg
Package weight: 0.164 kg

Package Contents

Package Contents: 1 x Smart Watch, 1 x Chinese and English Manual, 1 x Charging Clip

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports

D21 Smart Bracelet Watch Bluetooth 4.0 SMS Reminder Sleep Tracker Calorie Burning Incoming Call Show for Sports


FAQ for Smart Watch and Wristband
1. Q: I can’t charge my watch / bracelet and it doesn’t power on, what should I do?
A: If this is the first time you’ve charged your watch / bracelet, please use the adapter to power it, charge it for more than 3 hours, then press the button to start it;
If you have not used the watch / bracelet for a long time without charging it, the battery would have opened the UVP function. In this situation, you need to activate the battery before using. (You can go to the phone repair shop to activate the battery).

2. Q: Why can’t I connect with Bluetooth?
A: 1. If the phone's Bluetooth version is lower than the watch's / bracelet’s, they will
not be able to pair;
2. If the phone's Bluetooth version is equal to or higher than the watch's / bracelet’s, but is initially unable to pair, then you need to clear the Bluetooth connection history on the phone, scan and re-connect again.

3. Q: The watch / bracelet icon shows that it has paired over Bluetooth, however the APP cannot sync data. How do I resolve this?
A: Generally it is caused by the Bluetooth of the phone. Please close the APP first, restart the Bluetooth connection and re-pair the two devices. If the above step does not work, please restart your phone and try to pair the devices again.

4. Q: Why does my watch / bracelet frequently lose connection with my phone?
A: Please check if your phone or other security software has set the APP as a trusted APP or not. This is required to pair the two devices. If it hasn’t, please set it as trusted APP and try again.

5. Q: Why am I unable to connect with the APP?
A: Please making sure the OS of your phone is within the range that the smart watch / bracelet supports.

FAQ for Smart Watches

Q

Can this item be shipped to my country?

A

We can deliver orders to most countries. For a detailed explanation about each shipping method, destination and approximate delivery time, please check our website: http://www.gearbest.com/about/shipping-methods.html

Q

Why my new device cannot boot or start up properly?

A

Please charge your new device for at least 10 minutes or more before first usage; this ensures normal device boot and optimal operation. For devices with removable batteries, ensure they are properly installed before charging.

Q

What type of battery is normally used in smart watches? Is it rechargeable or not?

A

The smart watch comes with built-in lithium ion battery which is rechargeable.

Q

What can I do if Bluetooth cannot connect?

A

1. Make sure your phone Bluetooth and operative system are within the range that the smart watch supports. 2. Check the phone Bluetooth connection recording, clear it if there are too many recordings, then reconnect it; 3. Check whether the smart watch has enough battery, put it as close as possible to the phone, less than 10 meters.

Q

Can other watch interfaces be downloaded on the smart watch?

A

Other watch interfaces or themes cannot be downloaded, it only supports its own interfaces. Long press the watch's screen to switch interface.

Q

What application is used when connecting to a smart phone?

A

The app is designed by the supplier. You can scan the QR code on the package or manual to download it when you get the item.

Q

What functions can be used when Bluetooth is off?

A

Usually pedometer, sleep monitor, alarm and heart rate monitor still can be used without connecting to Bluetooth. Calling reminder, remote camera, find phone need Bluetooth connection.

Q

Why the pedometer does not count steps when I have already started walking?

A

To reduce errors, smart watch usually sets an initial value of 10, it will count steps when we walk more than 10 steps. The APP will show the real walking steps and start counting from step 10.

Q

How to switch languages? Can some other language package be downloaded?

A

You can switch the language in the “settings”, other language packs cannot be downloaded because it only supports the configured languages.

Customer Questions & Answers

  • By  Paolo Nov-13/2016 06:11:00

    Question:
    is it compatible with windows phone? Has the bracelet also chronometer ? Thank you

    Reply:

    Hello Paolo,

    Yes, the item is compatible with windows phone.

    The item also have chronometer.

  • By  Vale Nov-08/2016 06:11:40

    Question:
    Buongiorno, è possibile veder il numero dei passi e la frequenza cardiaca nel display del bracciale senza dover aver il cellulare a presso?

    Reply:

    Hello Vale,
    You can only see the data on the APP, can not see it on the Bracelet Watch.

  • By  viviane Oct-26/2016 05:10:46

    Question:
    1- How to make it track sleep? 2- How to turn off notification at night? It wakes me up at night by vibration every time i receive an email or msg or call. Other bracelets has the feature to turn on sleep mood so it stops the notifications. 3- How to make it light up only when I touch the screen not every time i move my wrist?

    Reply:

    Hello viviane,


    Thank you for your inquiry.

    1, open the bracelet sleep detection function, wearing the watch during sleep.You can see sleep detection data in the mobile phone APP next day.

    2, set the APP side to close the message alert on it, or directly close the phone Bluetooth, hand ring and mobile phone will be disconnected, you will not receive a message alert;

    3, this bracelet does not have lift the wrist bright screen function, the screen will not always bright, if you do not touch the screen, do not carry out any operation, the bracelet will automatically enter the standby state.

    Have a nice day!

  • By  Joao Roberto Sep-08/2016 11:09:25

    Question:
    Hello, Is it possible I use the heart rate monitor with another app? Like Caledos Runner from Windows Phone? Tks

    Reply:

    Hello Joao,

    Sorry that you can't use the heart rate monitor with another app. It only works with the app designed by the supplier. Thanks for your attention.

  • By  Joao Roberto Sep-08/2016 11:09:21

    Question:
    Hello, Is it possible I use the heart rate monitor with another app? Like Caledos Runner from Windows Phone? Tks

    Reply:

    Hello Joao,

    Sorry that you can't use the heart rate monitor with another app. It only works with the app designed by the supplier. Thanks for your attention.

27 Customer Questions & Answers >

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Customer Reviews

Overall Customer Rating:

4.8 13 Customer Reviews

Share your thoughts with other customers

Write a Review, Post Images, or Post Videos, and get G Points

  • good

    From Toader Nov 26,2016

    Pros:
    nice watch, nice color, looks great on the hand

    Cons:
    nothing

    Is this helpful? Yes 0 No 0

    Price 4

    Ease of Use 4

    Build Quality 4

    Usefulness 4

    Overall Rating 4

  • Human

    From Barbara Oct 29,2016

    Pros:
    It was easy to set up on my phone, I liked the app that came with it. It was good quality and fit comfortably.

    Cons:
    The battery life wasn't as long as I would have liked.

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 4

    Overall Rating 4

  • Average smartband with some nice features

    From Fredrik Gren Oct 16,2016

    Pros:
    Real time HR-monitor
    Text notifications from your phone (sms, contact name etc)

    Cons:
    Battery time
    Not so exact step counting
    A bit buggy app (android) that doesn't work with other apps notification etc.

    Is this helpful? Yes 0 No 0

    Price 4

    Ease of Use 4

    Build Quality 3

    Usefulness 4

    Overall Rating 4

  • D21 Bluetooth 4.0 Smart Bracelet Watch

    From carlos bonilla Oct 06,2016

    Pros:
    básico pero buen smart watch. contento por su funcionalidad

    Cons:
    problemas con el app, pero nada del otro mundo

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • D21 Bluetooth 4.0 Smart Bracelet

    From Ionut Sep 12,2016

    Pros:
    D21 Bluetooth 4.0 Smart Bracelet

    Cons:
    Battery would be nice to last a little bit longer

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

13 Customer Reviews >

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