1. Introduction
The HOCO Y21 Smart Watch is a versatile device designed to enhance your daily life with smart features, health monitoring, and sports tracking. This manual provides essential information for setting up, operating, and maintaining your smartwatch.

2. Package Contents
Before you begin, please ensure all items are present in your package:
- 1 x Y21 Call Version Smart Watch
- 1 x Brown Leather Strap
- 1 x Black/Gray Silicone Strap
- 1 x Magnetic Wireless Charger

3. Setup Guide
3.1 Initial Charging
Upon receiving your HOCO Y21 Smart Watch, it is recommended to fully charge it before first use. Use the provided magnetic wireless charger. Align the charger with the charging points on the back of the watch until it snaps into place magnetically. The watch display will indicate charging status.

3.2 Strap Attachment
The watch comes with both a leather strap and a silicone strap. To attach or change a strap, locate the quick-release pins on the back of each strap. Slide the pin to detach or attach the strap to the watch lugs. Ensure the strap is securely fastened before wearing.
3.3 Pairing with Mobile App
- Download the official HOCO Y21 companion app from your smartphone's app store (iOS or Android).
- Ensure Bluetooth is enabled on your smartphone.
- Open the app and follow the on-screen instructions to create an account or log in.
- Select 'Add Device' or similar option within the app.
- The app will search for your HOCO Y21 Smart Watch. Select it from the list of available devices.
- Confirm the pairing request on both your smartphone and the watch.
- Once paired, the app will guide you through initial settings, including language selection. The watch supports 22 languages including English, Russian, Spanish, Polish, Portuguese, Turkish, Italian, French, German, Ukrainian, Hebrew, Arabic, Greek, Vietnamese, Danish, Thai, Persian, Malay, Latin, Romanian, and Burmese.
4. Operating Instructions
4.1 Basic Navigation
The HOCO Y21 features a 1.43-inch AMOLED full-touch ultra-clear color screen. You can navigate through interfaces by swiping across the screen. The physical crown on the side of the watch can be rotated to quickly switch between multiple interfaces and functions, offering a tactile way to interact with the device.

4.2 Bluetooth Call Functionality
With Bluetooth 5.0, the HOCO Y21 supports direct calls from your wrist. Once connected to your mobile phone via Bluetooth, the watch can synchronize call records. You can answer incoming calls by sliding on the watch screen, dial numbers directly, or call back from your call history.

4.3 Information Reminders
After connecting to the mobile app, the watch will push information such as call reminders, text messages, and notifications from various social media and messaging applications directly to your wrist. This ensures you don't miss important news or communications.

5. Health Monitoring Features
The HOCO Y21 Smart Watch is equipped with a built-in biological sensor chip to monitor your health throughout the day. Key health metrics include:
- Heart Rate Monitoring: Continuously tracks your heart rate.
- Blood Oxygen Monitoring (Oxymeter): Measures your blood oxygen levels.
- Sleep Monitoring: Analyzes your sleep patterns to help you understand and improve your sleep quality.

6. Sports Modes
The watch supports over 120 sports modes, utilizing an intelligent motion algorithm to accurately record and analyze your exercise data. This includes tracking steps (passometer) and various activities, providing comprehensive insights into your fitness routines.

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 watch body. For the straps, follow the cleaning instructions specific to their material (leather or silicone). Avoid using harsh chemicals or abrasive materials.
7.2 Water Resistance
The HOCO Y21 Smart Watch has a 'Life Waterproof' rating, meaning it is resistant to splashes, rain, and sweat. It is not suitable for swimming, diving, or showering with hot water, as this may damage the device. Avoid prolonged exposure to water.
7.3 Strap Replacement
The watch bands are detachable, allowing for easy replacement or customization. Refer to section 3.2 for instructions on attaching and detaching straps.
8. Troubleshooting
- Watch not turning on: Ensure the watch is fully charged. Connect it to the magnetic charger and wait a few minutes before attempting to power it on again.
- 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 companion app.
- Notifications not appearing: Check the app settings on your phone to ensure notification permissions are granted for the companion app and the specific apps you wish to receive alerts from. Also, verify that the watch is properly connected via Bluetooth.
- Inaccurate health data: Ensure the watch is worn snugly on your wrist, about one finger's width above your wrist bone. Clean the sensor on the back of the watch regularly.
- Short battery life: Reduce screen brightness, disable unnecessary notifications, and limit continuous heart rate monitoring if not needed. Ensure the watch is fully charged using the correct charger.
9. Specifications
| Feature | Specification |
|---|---|
| Brand | HOCO |
| Model | Y21 |
| Display Size | 1.43 inch |
| Screen Material | AMOLED |
| Resolution | 466*466 |
| CPU | JL7012A6 |
| Memory (ROM) | 128 MB |
| Memory (RAM) | 640KB |
| Bluetooth Version | 5.0 |
| Battery Capacity | 230mAh |
| Use Time | 3-7 days |
| Standby Time | 25 days |
| Charging Method | Magnetic Wireless Charging |
| Waterproof Grade | Life Waterproof |
| Case Material | Alloy |
| Band Material | Leather (additional silicone strap included) |
| Weight | 57g |
| Dimensions (approx.) | 46.5mm (diameter) x 12mm (thickness) |
| Band Length | 260mm |
| Band Width | 22mm |
| Voice Assistant | No |
| GPS | No |
| SIM Card Available | No |
| Multiple Dials | Yes |
| Supported Languages | 22 languages (Chinese, English, Russian, Arabic, Vietnamese, Danish, Thai, Polish, Persian, Spanish, Malay, Greek, French, Italian, German, Portuguese, Turkish, Latin, Romanian, Hebrew, Burmese, Ukrainian) |

10. User Tips
- App Connection: For the best experience, ensure your watch is consistently connected to the companion app on your smartphone. This allows for data synchronization, notification delivery, and firmware updates.
- Accurate Readings: For accurate heart rate and blood oxygen measurements, wear the watch snugly on your wrist, ensuring the sensors are in good contact with your skin.
- Battery Optimization: To extend battery life, manage screen brightness, disable continuous monitoring features when not needed, and close background apps on the watch if available.
- Explore Dials: The watch supports multiple dials. Explore the companion app to customize your watch face to match your style or display preferred information.
11. Warranty and Support
For warranty information and customer support, please refer to the seller or contact HOCO customer service directly. Keep your proof of purchase for any warranty claims.