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D21 Smart Bluetooth Watch for Android iOS

 -  BLACK 173192704

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

Dispatch: Ships on May 1

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  • D21 Smart Bluetooth Watch for Android iOS
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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  Anja Apr-17/2017 11:04:25

    Question:
    hi, will it measure HR while doing pilates or HIIT, not only when running and/ or walking?

    Reply:

    Hello Anja,
    When you measure your heart rate,you need to keep in a stationary state.If you have been exercising,you may not be able to test or test inaccurately.

  • By  fernando Feb-15/2017 02:02:55

    Question:
    The bracelet give you the heart rate? Or do you need a separate band?

    Reply:

    Hello fernando


    Thank you for your inquiry.

    You do not need a separate band.

    It supports hear rate function.

    Thank you, Let me know if you need any help.

    Have a nice day!


  • By  Miroslav Feb-10/2017 04:02:52

    Question:
    is this wristband compatible with endomondo? Thank you

    Reply:

    Hello Customer,

    The answer is no.

  • By  giorgi laluashvili Jan-15/2017 02:01:09

    Question:
    can it track count calories?

    Reply:

    Hello giorgi,
    • Calorie consumption management: Calculate the consumption of calorie, record the daily burned calorie.

  • By  João Matos Dec-21/2016 03:12:24

    Question:
    If the wristbands are changeable where can I buy others of other colors?

    Reply:

    Hello João,
    Battery: 3.7V 500mAh ( built-in )

    Thanks for your inquiry.


34 Customer Questions & Answers >

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Customer Reviews

Overall Customer Rating:

4.7 15 Customer Reviews

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  • D21 Bluetooth 4.0 Smart Bracelet Watch

    From Tomáš Mar 26,2017

    Pros:
    Vše v pořádku. Jsem spokojen s produktem................

    Cons:
    Zatím nemám nic proti....................................

    Is this helpful? Yes 0 No 0

    Price 5

    Ease of Use 5

    Build Quality 5

    Usefulness 5

    Overall Rating 5

  • Review

    From TE Feb 10,2017

    Pros:
    the color is beautiful. the material is strong and flexible.

    Cons:
    the app is slow and poorly made

    Is this helpful? Yes 0 No 0

    Price 4

    Ease of Use 4

    Build Quality 5

    Usefulness 4

    Overall Rating 4

  • 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

15 Customer Reviews >

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