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Item specifics
  • Brand Name: teamyo
  • Language: English
  • Compatibility: All Compatible
  • Function: Passometer,Call Reminder,Message Reminder,Sleep Tracker,Fitness Tracker,Remote Control
  • Type: On Wrist
  • Application Age Group: Adult
  • Function: Heart Rate Monitor
  • Model: D21 Smart Band
  • Heart Rate Monitor: Green LED Heart Rate Sensor
  • Smart Bracelet Display: 0.66 inch OLED
  • MCU Chipset: nRF51822 Smartband
  • Smart Band Reminder: SMS and Call Reminder
  • Compatibility: Smart Bracelet for Android and iOS
  • Smart Wrsitband Battery: 80mAH Li-Poly Battery
  • Standby Time: About 5-7 days
  • Color: Pink,Purple,Black,White
  • Type: Pulseira inteligente
Product Description



Bluetooth Smart Wristband D21 Sport Smartband Heart Rate Pedometer Fitness Tracker

                            Bracelet For Android IOS NFC Call Reminder



  • Браслет Bluetooth Смарт браслет D21 Спорт Smartband сердечного ритма Шагомер Фитнес Tracker для Android IOS NFC вызовов Напоминание

This DFit smart wristband with OLED screen clearly displays health parameters including time and date, steps, distance, calories  as well as heart rate. With  adjustable wristband and light weight feature, you can wear it to do exercise, such as running, climbing,swimming, showering. When you do exercise, it can record your sports data. When you sleep, it will monitor your sleep. It can also wake you up by vibrating gently. All those data can be synchronized and analyzed on your smart phone. High performance and advanced smart features are the best advantages so that DFit smart wristband is your indispensible personal fitness companion. It\'s our pleasure to provide you a funny and healthy life.


  • Product parameters:
Main chip models: nRF51822 (Cortex M0 16MHz)
Life waterproof
Acceleration sensor: triaxial accelerometer
Display: OLED 0.66 inch 64x48 Dots
Vibration motor: cylindrical vibration motor
Heart rate monitor
Key way: touch keys
  • Precautions:
This product contains magnetic parts, has installed a pacemaker or implanted electronic devices or metal objects, please do not use this product.
When such wear, symptoms appear, please stop using the product immediately.
If you use sub-standard power charging will shorten battery life, and even damage the battery.
Our bracelet sealed process, anti-sweat, to meet the daily water, such as hand washing, bathing, swimming


Product Pictures

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Real Pictures
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More functions:
  • Model:D21 Heart Rate Smart Bracelet.
  • Function:Heart rate monitor, Pedometer, Sleep monitor, sedentary reminder, call remind, sms alert, alarm, sliding touch,
  • long standy,ultrafast charge,etc.
  • Built-in NFC chip: It can automatically transmit within 5cm response distance, fast swiping and replace the bus / metro card
  • 0.66 inch OLED touch screen for information watching: see call notifications, daily stats and time
  • G-sensor: adopts the newest flexible sensitive technology, the screen will light on when rotate wrist
  • Green light heart rate sensor: make accurate analysis of the hemokinesis situation with green LED light sensor
  • Health fitness tracker: monitor your activity levels, track walking distance and calculate calories burned, achieve the daily
  • exercise targets you set and work towards a healthier lifestyle
  • 80mAh li-polymer battery: long standby time, normal working time is up to 3-5 days
  • Light Weight, touch design, easy to operate
  • Syncs via Bluetooth with iOS and Android
  • IP66 life-level waterproof​​


​Main Functions:

Time Display Support
Date Display Support
Steps Display Support
Distance Display Support
Calorie Consuming Display Support
Calling Reminder Support
Message Reminder Support
Sitting Alert Support
Photo-taking Control Not Support 
Music Control Not Support 
Sleeping Monitoring Support
Bluetooth Connect Support
Battery-charging Protection Support
Keypad Not Support 
Anti-lost of Phone Not Support 
Heart Rate Monitoring                                              Support                                                

Main Chipset NRF51822
Sensor Triaxial Gravity Sensor
Languages Chinese, English
OS support : Android4.4 or higher, iOS 7.0 or higher
LCD Pixels 0.66" 64*48
BT Version Bluetooth 4.0
BT Connection Distance 8-12m
Battery 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
Woriking Humidity 5%~95% non-congealable
Dimension 23.7*12.2*(164~232mm)
Colors: Black, Pink, White, Purple
Main Body Material PC
Watchband Material Silica Gel
Net Weight 28g
Waterproof Grade                                                       IPX65
Package Content

1 x D21 Smart Band 

1 x User Manual

1 x Charge Cable


Packaging Details
  • Unit Type: piece
  • Package Weight: 0.15kg (0.33lb.)
  • Package Size: 20cm x 15cm x 15cm (7.87in x 5.91in x 5.91in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.15kg (0.33lb.)
  • Package Size: 20cm x 15cm x 15cm (7.87in x 5.91in x 5.91in)
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