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Item specifics
  • Type: On Wrist
  • Brand Name: VERY FiTEK
  • Application Age Group: Adult
  • Function: Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder
  • Compatibility: All Compatible
  • Language: English
  • Function: Swimming Monitoring
  • Language: Swimming Monitoring
  • Screen Display Size: 0.91 inch OLED Screen
  • Display Resolution: 128*32 Pixels
  • Bluetooth: Bluetooth 4.0
  • Compatibility: Android 4.3 and iOS 7.0 or above
  • Battery: 80mAH Polymer Battery
  • Swimming Monitoring: Support
  • Call Reminder: Support
  • Charge Time: 0.5 Hours
  • Waterproof Level: IP68
  • Colors: 3 Color Avaiable
Product Description


TK31 Bluetooth 4.0 Smart Bracelet Heart Rate Monitor IP68 Waterproof Swimming Sport Tracker Anti-lost for Android iOS PK Fitbit 

Main Feature:

  • IP68 Grade Waterproof and Dustproof,

    it available to identity 4 kinds of swimming strokes: 
    freestyle, breastroke, backstroke, butterfly stroke, calculate time of strokes and calorie burned.
  • Bracelet Bring with WeChat Sports Function
  • SMS Heart Rate Monitor and Palming Brighten Screen
  • Touch Key Area Switch Screen
  • Support IOS Calls and Android Message Sync



  • Display Type:0.91 inch OLED Screen
  • Display Resolution:128*32 Pixels
  • Button Way:Touch Button
  • Motor:Cylindrical Vibration Motor
  • Heart Rate Sensor Type:Yes
  • Continuous Heart Rate Test:12-18 Hour
  • Acceleration Sensor:Three Axis Acceleration
  • Bluetooth:Bluetooth 4.0
  • Bluetooth Chip:nRF51822
  • Charging Mode:Clip Charging
  • Battery:80mAH Polymer Battery Capacity
  • Power Requirements:5V 500mA
  • Charge Time:0.5 Hours or so
  • Standby Time:240 Hours
  • Use Time:96 Hours
  • Android Compatibility:Android 4.3 or above
  • iOS Compatibility:For iOS 7.0 or above
  • Smart Band Colors:Black, Silver, Golden
  • Watch Frame Material:Silicone
  • Watch Strap Material:Silicone
  • Waterproof Level:IP68
  • Product Size:56 * 21 * 12mm



  • Call Reminder:Support
  • Message Alert:Timely Message Reminder
  • Sleep Monitor:Yes
  • Pedometer:Calorie, Distance
  • WeChat Sports:Yes
  • Swimming Monitoring:Yes
  • Sedentary Remind:Yes
  • Tools:Silent Alarm
  • Language :Chinese, English
  • Palming Brighten Screen:Support 


Packaging Included:

  • 1 x Smart Band
  • 1 x Gift Box
  • 1 x USB Charging Cable
  • 1 x User Manual






  • We accept Alipay, West Union, TT. All major credit cards are accepted through secure payment processor ESCROW.
  •  Payment must be made within 3 days of order.
  •  If you can\'t checkout immediately after auction close, please wait for a few minutes and retry Payments must be completed within 3 days. 

  • WORLDWIDE SHIPPING. (Except some countries and APO/FPO)
  • Orders processed timely after the payment verification.
  • We only ship to confirmed order addresses. Your order address MUST MATCH your Shipping address.
  • The images shown are not the actual item and are for your reference only.
  • SERVICE TRANSIT TIME is provided by the carrier and excludes weekends and holidays. Transit times may vary, particularly during the holiday season.
  • If you have not received your shipment within 45 days from payment, please contact us. We will track the shipment and get back to you as soon as possible with a reply. Our goal is customer satisfaction!
  • Due to stock status and time differences, we will choose to ship your item from our first available warehouse for fast delivery.
  • Delivery Time:

  •  You have 7 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 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS! Shipping cost is bear by both seller and buyer in half.
  • 2. 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 P/O number.
  • 3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from aliexpress. OR, you may choose to have a replacement.
  • 4.  We will bear all the shipping cost if the product(s) is (are) not as advertised

  • 12 months Manufacturer`s limited Warranty for defective items (excluding items damaged and/or misused after receipt). Accessories come with a 3-month warranty.
  • Defective items MUST BE reported and returned within the warranty period (and in the original packaging, if possible). You must tell us what the defect is and give us your order number. WE DO NOT REPAIR OR REPLACE ITEMS WITH AN EXPIRED WARRANTY. You agree to all of the above-listed policies upon ordering on aliexpress!

We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns.
It is impossible to address issues if we do not know about them!







Packaging Details
  • Unit Type: piece
  • Package Weight: 0.15kg (0.33lb.)
  • Package Size: 10cm x 18cm x 2cm (3.94in x 7.09in x 0.79in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.15kg (0.33lb.)
  • Package Size: 10cm x 18cm x 2cm (3.94in x 7.09in x 0.79in)
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