Product will be shipped within 48 business hours. Please allow between 5-7 days for standard delivery. You will be emailed a tracking link after your order is shipped. Thank you for your purchase!

You can download or update the DaFit app here:

App Store

Google Play

SMT4 PRO works on any Android with a 5.0+ version and iOS 9.0+

The date and time will automatically be updated once the smart watch is paired with the app through Bluetooth.

Please remember to remove the protector film from the laser sensor before use.

Step 1: Wake your Smart Phone Device by pressing the button on the side of the watch.

Step 2: Go back to the app, tap the “ADD A DEVICE” button on the top right of the screen.

Step 3: Grant the device access to your smart phone when prompted.

From the Watch

• Step 1: Press and hold your finger on your current clock face to open the clocks app.

• Step 2: Move right or left to see the options.

• Step 3: Select the desired choice.

From the App

• Step 1: Open the app from your smart phone.

• Step 2: Tap the device icon.

• Step 3: Tap “Watch Faces”

• Step 4: Choose a clock face you like and tap. The changes will automatically applied to your device.

For measuring blood pressure, smartwatches use the optical heart rate sensor. It detects the time it takes for a pulse to travel from the heart to the wrist. It is also known as Pulse Transit Time (PTT), based on which it shows the blood pressure readings. If the blood pressure is high, the pulse transit time is faster, and if the blood pressure is low, the pulse transit time is slower. Measuring blood pressure is much harder than tracking heart rate and rhythm, and getting it right is arguable even more important. Having more ways to easily take blood pressure measurements at home could be a big benefits to people with hypertension (high blood pressure) or other concerns. Pressure measurement taken exclusively in a doctor’s office are often unreliable: Some people have higher blood pressure in-office because they’re anxious about the visit, while other people have masked hypertension – high blood pressure at home, but normal blood pressure at the doctor.

Use this checklist:

• Don’t eat or drink anything 30 minutes before you take your blood pressure.

• Empty your bladder before your reading.

• Sit in a comfortable chair with your back supported for at least 5 minutes before your reading.

• Put both feet flat on the ground and keep your legs uncrossed.

• Rest your arm with the cuff on a table at chest height.

• Make sure the smart watch is snug but not too tight.

• The watch should be against your bare skin, not over clothing.

• Do not talk while taking your blood pressure.

You can customize your order after checkout by purchasing additional watch bands in the additional colors we offer. We currently stock white, pink and navy blue.