Introduction
Thank you for choosing the HASAKEI S53 Smartwatch. This manual provides essential information for setting up, operating, and maintaining your device. The S53 Smartwatch features a 1.39-inch HD touchscreen, Bluetooth calling capabilities, comprehensive health monitoring, and support for over 120 sports modes. Please read this manual thoroughly to ensure optimal performance and longevity of your smartwatch.

Image: The HASAKEI S53 Smartwatch in rose gold, featuring a 1.39-inch round display with a floral watch face and a rose gold mesh strap. An additional small image shows the watch with a pink silicone strap, displaying an incoming call notification.
Setup
1. Unboxing and Initial Charge
Carefully remove the smartwatch and all accessories from the packaging. Before first use, fully charge the device. Connect the magnetic charging cable to the charging points on the back of the watch and plug the USB end into a compatible power adapter (not included). A full charge typically takes approximately 1.5 hours.

Image: The HASAKEI S53 Smartwatch connected to its magnetic charging cable, displaying a 100% battery level on its screen. Text indicates a 300mAh battery, 30 minutes for charging, 8-15 days of daily use, and up to 25 days standby time.
2. App Installation and Device Pairing
- Download the App: Scan the QR code provided in the quick start guide or search for the designated companion app (e.g., 'FitCloudPro' or similar, check packaging for exact name) on the App Store (iOS) or Google Play Store (Android).
- Create Account: Open the app and follow the on-screen instructions to create a user account and set up your personal profile.
- Pair Device: Ensure Bluetooth is enabled on your smartphone. In the app, navigate to the 'Device' or 'Add Device' section. Select 'S53' from the list of available devices. Confirm the pairing request on both your phone and the smartwatch.
- Grant Permissions: Allow necessary permissions (e.g., notifications, location, contacts) for the app to function correctly.
Operating the Smartwatch
1. Basic Navigation
- Touchscreen: Swipe left/right to navigate between main screens (e.g., activity data, heart rate). Swipe up/down to access quick settings or notifications.
- Side Button: Press to wake the screen, return to the home screen, or access the main menu.
- Watch Faces: Long-press the home screen to change watch faces. More than 200 online watch faces and DIY options are available via the app.
2. Bluetooth Calling
The S53 Smartwatch supports Bluetooth 5.3 for stable calls and clear audio. After successful pairing, you can answer calls directly from your wrist.
- Answering Calls: When a call comes in, tap the green icon on the watch screen to answer.
- Making Calls: Use the watch's dial pad or access your synced contacts (up to 500) to initiate a call.
- Notifications: Receive notifications for messages from WhatsApp, Facebook, SMS, and other applications directly on your watch.

Image: A close-up of the HASAKEI S53 Smartwatch on a wrist, showing a call in progress. Icons highlight features like a built-in microphone, contact synchronization, and a high-fidelity speaker. Additional graphics illustrate contact management, independent audio settings, and a Do Not Disturb mode.
3. Health Monitoring
The smartwatch provides continuous health tracking to help you monitor your well-being.
- Heart Rate: Monitors your heart rate 24 hours a day. View real-time data and historical trends in the app.
- SpO2 (Blood Oxygen): Measures your blood oxygen saturation levels.
- Sleep Monitoring: Tracks your sleep patterns, including deep sleep, light sleep, and awake times.
- Female Health: Features for tracking menstrual cycles, ovulation periods, and safe periods.

Image: A composite image showing the HASAKEI S53 Smartwatch's health monitoring capabilities. One section displays heart rate and blood oxygen graphs, while another illustrates sleep monitoring data, including deep sleep, light sleep, and awake durations.

Image: The HASAKEI S53 Smartwatch interface showing female health tracking features, including icons for menstruation, ovulation, safe period, and pregnancy. A calendar view is also displayed, indicating cycle tracking.
4. Sports Modes
The S53 Smartwatch supports over 120 sports modes, allowing you to track various activities with professional algorithms. Data can be synchronized to the companion app.
- Tracking: Monitor calories burned, distance covered, and steps taken for each activity.
- Examples: Includes modes for yoga, outdoor running, cycling, mountaineering, skiing, and more.

Image: A woman running outdoors, wearing the HASAKEI S53 Smartwatch. The watch screen displays fitness data such as calories (456 kcal), distance (3.5 km), and steps (13564). Various sport mode icons are also shown, including elliptical, spinning bike, and yoga.
5. Other Features
- AI Voice Assistant: Interact with your smartwatch using voice commands.
- Reminders: Sedentary reminder, drink water reminder.
- Tools: Alarm clock, calculator, weather forecast, breathing training, remote camera control, music player control, mobile phone finder, chronograph.
Maintenance
1. Cleaning
Regularly clean your smartwatch to maintain its appearance and functionality. Use a soft, lint-free cloth to wipe the screen and casing. For stubborn dirt, slightly dampen the cloth with water. Avoid using harsh chemicals or abrasive materials.
2. Water Resistance (IP68)
The HASAKEI S53 Smartwatch is IP68 rated, meaning it is resistant to dust and can withstand immersion in water up to 1.5 meters for 30 minutes. It is suitable for daily use, including hand washing, rain, and showering. However, it is not recommended for hot water activities, diving, or prolonged submersion.
3. Battery Care
To prolong battery life, avoid extreme temperatures. Charge the watch fully before long periods of inactivity. If the watch will not be used for an extended time, charge it to about 50% and store it in a cool, dry place.
Troubleshooting
- Watch not turning on: Ensure the watch is fully charged. Connect it to the charger for at least 30 minutes.
- Cannot pair with phone: Make sure Bluetooth is enabled on your phone and the watch is within range. Restart both the watch and your phone, then try pairing again through the app. Ensure the app has all necessary permissions.
- Inaccurate health data: Ensure the watch is worn snugly on your wrist, about one finger's width from your wrist bone. Clean the sensor on the back of the watch.
- Notifications not received: Check app permissions on your phone to ensure notification access is granted. Verify that notifications are enabled within the companion app settings.
- Short battery life: Reduce screen brightness, disable unnecessary features, and ensure the app is not running excessive background processes.
Specifications
| Brand | HASAKEI |
| Model | S53 |
| Display | 1.39-inch HD Touchscreen, 360 x 360 resolution |
| Connectivity | Bluetooth 5.3 |
| Battery Capacity | 300 mAh Lithium-polymer |
| Charging Time | Approx. 1.5 hours |
| Battery Life | 8-15 days (daily use), up to 25 days (standby) |
| Water Resistance | IP68 |
| Weight | Approx. 29 grams (casing) |
| Compatible Systems | Android 5.1 and higher, iOS 8.0 and higher |
| Health Monitoring | 24-hour Heart Rate, SpO2, Sleep Tracking, Female Health Functions |
| Sports Modes | 120+ modes |
| Other Features | Bluetooth Calling, AI Voice Assistant, Reminders (sedentary, drink water), Alarm, Calculator, Weather, Breathing Training, Remote Camera, Music Player Control, Phone Finder, Chronograph, 200+ Watch Faces, DIY Watch Faces |
Support
For further assistance, please refer to the support section within the companion app or contact HASAKEI customer service. Details for customer support can typically be found on the product packaging or the official HASAKEI website.




