<p><strong>How to connect the app:</strong></p><p>1. Download and install the app "Da Fit" to your phone</p><p>2. Open the app and click “Add a Device”</p><p>3. Select and click NK03 in the device list</p><p>4. Then pair with the "Audio_NK03" to open the bluetooth call and music play. (Some phones need to go to the Bluetooth setting of the phone and find the "Audio_NK03" to connect)</p><p><br></p><p><strong>Warm Tips:</strong> The Bluetooth connection distance should not exceed 10 meters, Partition wall should not exceed 3 meters.</p><p><br></p><p><strong>Specifications:</strong></p><p>Model: NK03</p><p>Bluetooth Transmission Distance: 10 Meters (33 feet)</p><p>Screen Type: 1.72 Inch HD full touch color screen</p><p>Shell material: Aluminum alloy</p><p>Charging Time: 2-3 hours</p><p>Usage time: Normal use 3-5 days, standby 15 days</p><p>Waterproof level: IPX4 Life waterproof</p><p>System Requirements: iOS 8.0 and above, Android 4.0 and above</p><p><br></p><p><strong>Features:</strong></p><p>1. Bluetooth Call Smartwatch(Support Receive/Make Call).</p><p>2. Music Playback and Control.</p><p>3. Aluminum alloy one-piece appearance, stylish and lightweight, 1.72 inch HD full touch screen, easy control with the sensitive touch screen.</p><p>4. A variety of sports fitness watch (walking, running, cycling, Basketball)</p><p>5. Mental Health Reminder of Female Physiological Cycle. </p><p>6. Pedometer Watch: Display steps, calorie, distance, heart rate.</p><p>7. Heart Rate/Blood Pressure/Blood Oxygen Monitor Watch:24 Hours continuous Monitoring.</p><p>8. Sleep Monitor Watch: Automatically monitor and analyze sleep quality</p><p>9. Smart Reminder for Information</p>