Report item
Item specifics
  • Language: English
  • Compatibility: All Compatible
  • Function: Passometer,Call Reminder,Message Reminder,Mood Tracker,Sleep Tracker,Fitness Tracker,Push Message
  • Brand Name: BINYEAE
  • Type: On Wrist
  • Application Age Group: Adult
  • Chipset: NRF51822
  • Standby Time: 7 days
  • Waterproof Grade: 50M
  • Charging Electric Current: 200mA
  • OS: Android4.3 or higher,iOS 7.0 or higher
Product Description

Heart Rate Waterproof Smart Wristband Bracelet DFit D21 Fitness Tracker Swim Band Sport Smartband Pulsometer for Android iOS


Chipset NRF51822
Sensor Triaxial Gravity Sensor 
Hardware Parameter Single core
Software Parameter OSAL
Languages Chinese, English
OS Android4.3 or higher,iOS 7.0 or higher
LCD Pixels 0.66" 64*48
BT Connection Distance 8-12m
Capacity 80mAh
Standby Time 7 days
Charging Electric Current 200mA
Charging Type Touching Point Charging(Clip Charger)
Average Working Current 6mAh
Average Standby Current Less than 40uA 
Working Voltage 3.7V
Working Temperature -20~70 degree
Woriking Humidity 5%~95% non-congealable
Dimension 23.7*12.2*164~232mm
Colors Black,Pink,White,Purple
Net Weight 28g
Waterproof Grade IP67

Time Display

Date Display Support
Steps Display Support
Distance Display Support
Calorie Consuming Display Support
Calling Reminder Support
Message Reminder Support
Sitting Alert Support
Sleeping Monitoring Support
Bluetooth Connect Support
Battery-charging Protection Support
Keypad Support
Heart Rate Monitoring

1*D21 smart watch

1 * USB Cable
1 * Chinese/English Manual 
1 * Retail Package



TIP: Anything what I can help you, you can contact me through Message Center or TradeManager. PLS do not open any Dispute and leave any Feedback which is not 5 stars. I am happy to help you.


1) We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment process ESCROW.

2) We are not responsible for any customs duty or import tax. Please check with your country\'s customs office to determine what these additional costs before buying.

NoteIf you have decided to buy this item, please pay as soon as you can, so we can ship to you faster.


1. Every item will be tested before shipping.

2. Please tell me your Detail Name/Address/ Post code/Telephone Number after your payment within 24 hours; otherwise, we will ship your item based on your Escrow address, so make sure it is correct. All the cost due to the wrong information will be afforded by the buyer.

3. Our Shipping Method cover: ePacket, Sweden Post, Nether lands Packet, China Post, HK Post, Sinapore Post, FEDEX, UPS, DHL.

4. In normal condition, reach most countries 15-30 days will arrive the address you leave. (Russian Federation:20-60 days,Brazil:20-90 days)

5. Sometimes it would be longer because of the bad weather, a waste of time in customs clearance. Thus please wait patiently when you do not receive your item on time. If you don\'t receive the item within 30 days, please contact us, and then we will help you track it.

6. We will declare it as a gift and a lower value to avoid the tax. But sometimes in some countries, the customs officer may be strict. we are not accountable for any customs fee in your country.

Refund & Return

  • We put buyer\'s satisfaction at top priority. If the goods has any problem and we return all of the money, the buyer needs return back the goods to us, we need the goods send to factory. And buyer pay for the ship cost.

  • You have 3 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 3 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are no EXCEPTIONS!

  • All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your order number.

  • If the items are damaged or lost when they are returned, the buyer will be responsible for such damage or loss, and we will not give the buyer a full refund. The buyer should try to file a claim with the logistic company to recover the cost of damage or loss.


Packaging Details
  • Unit Type: piece
  • Package Weight: 0.2kg (0.44lb.)
  • Package Size: 15cm x 9cm x 3cm (5.91in x 3.54in x 1.18in)
Calculate your shipping cost by country/region and quantity.
Quantity: Ship to:
Packaging Details
  • Unit Type: piece
  • Package Weight: 0.2kg (0.44lb.)
  • Package Size: 15cm x 9cm x 3cm (5.91in x 3.54in x 1.18in)
We support the following payment methods. All payments made on AliExpress are processed by Alipay.