1. Introduction
Thank you for choosing the Blackview Smart Watch W40. This manual provides essential information for setting up, operating, and maintaining your new smartwatch. Please read it thoroughly to ensure optimal performance and a seamless user experience.

Image: The Blackview Smart Watch W40 in Gold Pink, showcasing its round AMOLED display and two interchangeable straps (silicone and nylon braided).
2. What's in the Box
- Smart Watch x1
- Silicon Strap x1
- Nylon Strap x1
- Charging Cable x1
- Product Manual x1

Image: A visual representation of all items included in the Blackview Smart Watch W40 packaging.
3. Setup
3.1 Charging the Device
Before first use, fully charge your smartwatch. Connect the magnetic charging cable to the charging points on the back of the watch. Plug the USB end into a standard USB power adapter (not included). A full charge typically takes approximately 2.5 hours.

Image: The smartwatch being charged via its magnetic cable, with indicators for charging time, battery life, and standby time.
3.2 App Installation and Pairing
- Download the App: Scan the QR code displayed on the watch screen or in the manual, or search for "Da Fit" in your smartphone's app store (compatible with Android 6.0+ and iOS 9.0+).
- Enable Bluetooth: Ensure Bluetooth is enabled on your smartphone.
- Pair the Device: Open the "Da Fit" app, navigate to the device section, and select "Add a Device." The app will search for your smartwatch. Select 'W40' from the list to pair.
- Grant Permissions: Follow the on-screen prompts to grant necessary permissions for notifications, health tracking, and calls.

Image: A visual guide demonstrating the process of connecting the smartwatch to the Da Fit application on a smartphone.
4. Operating Instructions
4.1 Basic Navigation
- Touchscreen: Swipe left/right, up/down to navigate through menus and features. Tap to select.
- Side Button: Press to wake the screen, return to the home screen, or access the main menu.
4.2 Calls & Notifications
Once paired via Bluetooth, the smartwatch allows you to make and receive calls directly from your wrist. You will also receive real-time notifications from various apps configured in the "Da Fit" app.

Image: The smartwatch showing its capability to handle Bluetooth calls, receive notifications, and utilize an AI voice assistant.
4.3 AI Voice Assistant
Activate the AI Voice Assistant with a simple command to set alarms, check weather, and perform other tasks, enhancing efficiency.
4.4 Watch Faces & Customization
Choose from a wide selection of watch faces or customize them with your own photos via the "Da Fit" app to personalize your device.

Image: Multiple watch face options displayed on the Blackview Smart Watch W40, highlighting customization features.
4.5 Multi-Tools
The watch includes practical tools such as a calculator, flashlight, stopwatch, and world clock to assist with daily needs.

Image: A collage of practical functions available on the smartwatch, including weather, alarm, music control, camera remote, calculator, and more.
5. Health Monitoring
The Blackview Smart Watch W40 offers comprehensive health monitoring features to help you stay informed about your well-being. Note: This product is not a medical device. Test data and results are for reference only.
- Heart Rate Monitoring: Provides 24/7 real-time heart rate monitoring.
- Blood Oxygen (SpO2) Monitoring: Accurately tracks blood oxygen saturation levels.
- Stress Monitoring: Monitors your stress status throughout the day.
- Sleep Monitoring: Divides sleep into four stages (deep sleep, light sleep, wakefulness, and REM) and analyzes sleep quality.
- Menstrual Cycle Tracking: Smart period tracking with AI predictions to help manage menstrual cycles.

Image: A visual overview of the smartwatch's scientific health management capabilities, showing heart rate, blood oxygen, stress, and detailed sleep monitoring.
6. Sports Modes
With over 100 sports modes, the smartwatch caters to diverse fitness needs. Connect to GPS via the "Da Fit" app to track steps, calories burned, and exercise duration.
- Activity Tracking: Records steps, calories, and distance.
- Diverse Modes: Includes running, cycling, mountaineering, yoga, and more.

Image: The smartwatch interface showing various sports modes and tracking metrics like steps, calories, and exercise time.
7. Maintenance
7.1 Cleaning
Regularly clean your smartwatch and straps to prevent skin irritation and maintain device hygiene. Use a soft, damp cloth to wipe the screen and body. For silicone straps, mild soap and water can be used. Ensure the watch is completely dry before wearing.
7.2 Water Resistance
The Blackview Smart Watch W40 is IP68 water-resistant, meaning it can withstand dust, dirt, and sand, and is resistant to submersion up to a maximum depth of 1.5m for up to 30 minutes. It is suitable for daily use, hand washing, and light rain. Avoid hot water, saunas, or diving, as these may compromise the water resistance.
8. Troubleshooting
- Watch not turning on: Ensure the watch is fully charged.
- Unable to pair with phone: Check if Bluetooth is enabled on your phone and the watch is within range. Restart both devices and try again.
- Notifications not received: Verify that app permissions are granted in the "Da Fit" app and your phone's settings. Ensure the watch is connected via Bluetooth.
- Inaccurate health data: Ensure the watch is worn snugly on your wrist, not too tight or too loose. Clean the sensors regularly.
- Short battery life: Reduce screen brightness, disable unnecessary notifications, and limit continuous heart rate monitoring.
9. Specifications
| Feature | Specification |
|---|---|
| Product Dimensions | 7.17 x 3.39 x 0.71 inches |
| Item Weight | 1.92 ounces |
| Item Model Number | W40 |
| Batteries | 1 AAA batteries required (included) |
| Standing Screen Display Size | 1.43 Inches |
| Memory Storage Capacity | 128 MB |
| RAM Memory Installed Size | 481 KB |
| Operating System | iOS, Android |
| Special Feature | Always On Display |
| Battery Capacity | 380 Milliamp Hours |
| Connectivity Technology | Bluetooth |
| Wireless Communication Standard | Bluetooth |
| Battery Cell Composition | Lithium Ion |
| GPS | GPS Via Smartphone |
| Shape | Round |
| Screen Size | 1.43 Inches |

Image: Detailed dimensions of the smartwatch and its two included straps.
10. Warranty and Support
Blackview provides a standard manufacturer's warranty for this product. For detailed warranty information, technical support, or service inquiries, please refer to the warranty card included in your package or visit the official Blackview website. Keep your purchase receipt for warranty claims.
11. Official Product Videos
Blackview W40 Smartwatch Overview
Video: A comprehensive overview of the Blackview W40 smartwatch, highlighting its key features and design.
Smart Watch Details
Video: A detailed look at the smartwatch's functionalities and user interface.
What I Noticed About This Watch
Video: An in-depth review of the smartwatch's performance and user experience.





