Introduction
This manual provides detailed instructions for setting up, operating, and maintaining your Tinwoo Smart Watch T21. Designed for durability and high performance, this smartwatch offers a range of features including health monitoring, sports tracking, and communication capabilities. Please read this manual thoroughly to ensure optimal use and longevity of your device.
What's in the Box
Upon unboxing your Tinwoo Smart Watch T21, please verify that all the following components are included:
- A watch body
- A watch strap
- A charging cable
- A manual
Product Overview
The Tinwoo Smart Watch T21 features a robust design with a 1.39-inch HD screen, offering clear visuals and a smooth touch experience. It is equipped with various sensors on the back for health monitoring and a side button for navigation and control.

Image: Front view of the Tinwoo Smart Watch T21 in Silver, showcasing its display and overall design.

Image: Rear view of the Tinwoo Smart Watch T21, highlighting the health sensors and charging contacts.
Setup
1. Charging the Smart Watch
Before initial use, fully charge your Tinwoo Smart Watch T21. Connect the provided charging cable to the magnetic contacts on the back of the watch and plug the USB end into a compatible power source (e.g., computer USB port, wall adapter). A full charge typically takes approximately 2 hours.
2. App Installation and Pairing
To unlock the full functionality of your smartwatch, you need to install the companion application on your smartphone and pair the devices via Bluetooth.
- Download the App: Search for the official Tinwoo app in your smartphone's app store (compatible with Android 6.0 and iOS 9.0 or above).
- Enable Bluetooth: Ensure Bluetooth is enabled on your smartphone.
- Open the App: Launch the Tinwoo app and follow the on-screen instructions to add a new device.
- Pair the Watch: Select your Tinwoo Smart Watch T21 from the list of available devices in the app. Confirm the pairing request on both your phone and the watch if prompted.
Once paired, the watch will synchronize data and notifications with your smartphone.
Operating Instructions
Bluetooth Calling and Notifications
After connecting your smartwatch to your phone via Bluetooth, you can make and receive calls directly from your wrist. The watch also displays call history and allows access to frequently contacted contacts. It will vibrate to alert you of incoming messages and app notifications (e.g., Facebook, WhatsApp, Instagram, X, Telegram, TikTok, Skype). Please note that direct replies from the watch are not supported. The built-in speaker and Bluetooth connectivity also enable music playback through the smartwatch.

Image: Illustration of the smartwatch's one-click wireless call feature, showing the call interface.
Health Tracking
The Tinwoo Smart Watch T21 provides comprehensive health monitoring features, including 24-hour heart rate tracking, real-time SpO2 (blood oxygen saturation), and BP (blood pressure) monitoring. It also analyzes your sleep quality, distinguishing between deep sleep, light sleep, and wake-up times, to help you make informed adjustments for better rest.

Image: Visual representation of the smartwatch's multifaceted health monitoring capabilities.
Sports Modes
With over 100 sports modes, the Tinwoo smartwatch accurately tracks various activities such as walking, running, cycling, gym workouts, swimming, yoga, hiking, football, and baseball. It records essential metrics like steps, distance, and calories burned, providing a detailed overview of your physical activity.

Image: Depiction of the smartwatch's support for over 100 sports modes.
Customization (Watch Faces)
Personalize your smartwatch experience with over 300 customizable watch faces. Easily switch between different styles to match your mood or occasion directly from the watch or through the companion app.

Image: A selection of the 300+ watch faces available for customization.
LED Flashlight
The Tinwoo Smart Watch T21 includes a super bright LED flashlight feature, providing convenient illumination when needed. Activate it directly from the watch interface.

Image: Illustration of the smartwatch's built-in LED flashlight feature.
AI Voice Assistant
Utilize the integrated AI voice assistant for quick access to various functions. You can use voice commands to control music, check the weather, find contacts, and inquire about your health condition.

Image: Visual representation of the AI voice assistant function on the smartwatch.
Other Features
The Tinwoo Smart Watch T21 is equipped with additional convenient features, including:
- Music control
- Camera control
- Sedentary reminders
- Breathing training
- Weather updates
- Alarm clock
- Stopwatch
- Timer
- Female period tracking
- Find your phone function
- Calculator
Maintenance
Water Resistance (IP68)
The Tinwoo Smart Watch T21 boasts an IP68 waterproof rating, meaning it is designed to withstand dust, dirt, and sand, and is resistant to submersion up to a maximum depth of 1.5m for up to 30 minutes. This makes it suitable for daily wear, including during rainy days or while swimming. However, it is important to avoid prolonged submersion in deep water, exposure to hot water, or high-pressure water jets (e.g., from a shower or strong faucet) to prevent potential damage and ensure the longevity of the device.

Image: The smartwatch demonstrating its IP68 waterproof capability.
Cleaning
To keep your smartwatch clean, gently wipe the screen and strap with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials that could damage the watch's surface or sensors.
Battery Care
The 290mAh battery provides up to 30 days of standby time, 15 days of regular use, or 7 days of heavy use. To maximize battery life, avoid extreme temperatures, use the original charging cable, and fully charge the device before extended periods of non-use.

Image: Visual indicating the long battery life of the smartwatch.
Troubleshooting
If you encounter any issues with your Tinwoo Smart Watch T21, please refer to the common solutions below. If the problem persists, contact customer service for further assistance.
- Watch not turning on: Ensure the watch is fully charged. Connect it to the charger and wait a few minutes before attempting to power it on.
- Bluetooth connectivity issues: Ensure Bluetooth is enabled on both your watch and smartphone. Try restarting both devices and re-pairing them through the app. Make sure the app is updated to the latest version.
- Notifications not appearing: Check app notification settings on your smartphone and within the Tinwoo app to ensure permissions are granted and notifications are enabled for desired applications.
- Inaccurate health data: Ensure the watch is worn snugly on your wrist, about one finger's width above the wrist bone. Keep the sensors clean.
- Water damage concerns: While the watch is IP68 rated, avoid prolonged submersion, hot water, or high-pressure water exposure. If water ingress is suspected, power off the device immediately and allow it to dry completely before attempting to use it again.
Specifications
Key technical specifications for the Tinwoo Smart Watch T21:

Image: Detailed product parameters and dimensions of the Tinwoo Smart Watch T21.
| Feature | Detail |
|---|---|
| Model Number | T21 |
| Package Dimensions | 10.98 x 2.91 x 0.59 inches |
| Item Weight | 1.38 ounces (39 Grams) |
| Screen Size | 1.39 Inches |
| Screen Resolution | 360x360 |
| Battery Capacity | 290 Milliamp Hours |
| Waterproofing Grade | IP68 |
| Connectivity Technology | Bluetooth |
| Operating System | Tinwoo (Proprietary) |
| Memory Storage Capacity | 128 MB |
| Compatible Devices | Smartphones running Android 6.0 and iOS 9.0 or above |
| Special Features | Activity Tracker, Music Player, Touchscreen, Voice Call, Voice Control, LED Flashlight |
Warranty and Support
The Tinwoo Smart Watch T21 comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and quality issues. If you encounter any problems with accessories, product quality, or charging, please do not hesitate to contact Tinwoo customer service. We are committed to providing a solution within 24 hours.
For support, please refer to the contact information provided with your purchase or visit the official Tinwoo website.


