1. Introduction
Thank you for choosing the ALLOYSEED SY12/SY13 Smart Padlock. This manual provides essential information for the safe and efficient use of your new smart padlock. Please read all instructions carefully before use and keep this manual for future reference.
The ALLOYSEED Smart Padlock offers advanced security features including fingerprint, password, and Tuya APP unlocking methods. Designed for durability and convenience, it is suitable for a wide range of applications.

2. Important Safety Instructions
For your protection, read and understand all instructions before use. Keep this manual for future reference.
- Use: For household use only. Use only as described in this manual.
- Condition: Do not use if the product is damaged in any way.
- User: Intended for persons aged 18 and above. Persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, may use only under close supervision and if they understand the hazards involved.
Always prioritize safety. Contact the manufacturer with any questions.
3. Product Variants
The ALLOYSEED Smart Padlock is available in two main models, each with optional Tuya APP connectivity:
- SY12 Fingerprint Lock: Unlocks using registered fingerprints. Available with or without Tuya APP functionality.
- SY13 Password Lock: Unlocks using a numeric password. Available with or without Tuya APP functionality.

4. Key Features
- Strong Waterproof Performance: Constructed from zinc alloy and 304 stainless steel, this padlock is thickened and hardened for durability and rust resistance. With an IP67 waterproof rating, it functions reliably even in rainy conditions.
- Convenient Unlocking Options: Choose from multiple unlocking methods:
- Fingerprint: Stores up to 10 different fingerprints (SY12 models).
- Password: Features a 6-digit, 10-group code system using 1-9 numeric buttons (SY13 models).
- Tuya APP: For models with Tuya APP, unlock remotely and manage settings via Bluetooth-Compatible.
- Smart and User-Friendly (Tuya APP models): Connect your smartphone via Bluetooth to the Tuya app to manage fingerprints, view unlocking records, and remotely unlock the padlock.
- Strong Battery Life: Powered by 2 CR2032 button batteries (400mAh total capacity), offering an ultra-long standby time of up to 12 months on a single set of batteries.
- Versatile Application: Ideal for securing housing rooms, gates, factory workshops, offices, bicycles, electric vehicles, cabinet doors, backpacks, travel boxes, file cabinets, student dormitories, employee lounges, and more.



5. Specifications
| Feature | Specification |
|---|---|
| Model Numbers | SY12 (Fingerprint), SY13 (Password) |
| Material | Zinc alloy + 304 Stainless steel |
| Protection Level | IP67 (Waterproof) |
| Ways to Unlock | Fingerprint, Password, Tuya APP (Bluetooth-Compatible) |
| Number of Fingerprints (SY12) | Up to 10 |
| Password Combination (SY13) | 1-9 numeric buttons |
| Password Length (SY13) | 6 digits |
| Password Storage (SY13) | 5 sets of passwords |
| Emergency Unlocking | Maurs code (for password models) |
| Battery Capacity | 400mAh (2 x CR2032 button batteries) |
| Standby Time | Up to 12 months |
| Working Temperature | -10℃ to 50℃ |
| Working Humidity | 0-90% |
| Working Voltage | 6V |
| Product Dimensions | Approx. 76 x 46 x 20mm (2.99 x 1.81 x 0.78 inches) |
| Net Weight | 110g |
| Suitable Door Type | Steel Door (also suitable for various other applications) |

6. Setup
6.1. Initial Power-Up
When you receive the product, locate the battery compartment (usually on the back). Tear off the plastic film on the batteries to energize the product. The padlock should now be ready for initial use.
6.2. Tuya APP Setup (for models with Tuya APP)
- Download Tuya APP: Scan the QR code provided in the original manual or search for "Tuya Smart" in your mobile app store to download and install the application.
- Connect Bluetooth: On the padlock, press any random number button for approximately 3 seconds. The blue light on the padlock will illuminate, indicating it is in pairing mode.
- Add Device in App: Open the Tuya Smart App on your smartphone. Click the "+" icon in the upper right corner, then select "Add Device" to search for your padlock.
Note: If the user deletes all devices from the Tuya App while the padlock is connected, the padlock will be restored to factory settings.
7. Operating Instructions
7.1. Default Password Unlocking (SY13 Password Lock)
The factory default password for the SY13 Password Lock is 123456. To unlock:
- Enter the default password (123456) using the numeric buttons.
- The blue light will be on after pressing each number.
- If the password is incorrect, the red light will flash for one second.
- If the password is correct, the green light will flash for one second, and the padlock will unlock automatically.
7.2. Fingerprint Unlocking (SY12 Fingerprint Lock)
To unlock using a fingerprint:
- Place your registered finger on the fingerprint sensor.
- The padlock will scan your fingerprint.
- If the fingerprint is recognized, the green light will flash, and the padlock will unlock. If not, the red light will flash.

7.3. Tuya APP Unlocking (for models with Tuya APP)
Once paired with the Tuya APP, you can unlock the padlock directly from your smartphone. Refer to the Tuya APP interface for specific unlocking procedures, which typically involve selecting the padlock and tapping an unlock icon.
7.4. Managing Fingerprints/Passwords via Tuya APP
For Tuya APP enabled models, you can add, delete, or modify fingerprints and passwords directly through the app interface. Consult the Tuya APP's help section for detailed instructions on user management.
8. Maintenance
8.1. Battery Replacement
The padlock uses two CR2032 button batteries. When the battery is low, the padlock may indicate this with a specific light pattern or through the Tuya APP. To replace the batteries:
- Locate the battery compartment, typically on the back or side of the padlock.
- Open the compartment using a small screwdriver or coin if necessary.
- Remove the old CR2032 batteries and insert new ones, ensuring correct polarity.
- Close the battery compartment securely.
After replacing the batteries, the padlock should resume normal operation.
8.2. Cleaning
Wipe the padlock with a soft, dry cloth. Do not use abrasive cleaners or solvents, as these may damage the finish or internal components.
9. Troubleshooting
9.1. Abnormal Operation
If the product exhibits abnormal behavior (e.g., not unlocking, unresponsive buttons):
- Try to open the lock several times using your usual method.
- If the issue persists, replace the button cell batteries with new ones and try again.
9.2. Factory Data Reset
To restore the padlock to its factory default settings (clearing all registered fingerprints and custom passwords):
- Long press the number key "9" until the blue light illuminates.
- Continue holding for approximately 6 seconds until the red light blinks.
- While the red light continues to flash, enter the password (if applicable, or follow the specific reset sequence for your model).
- If the password is entered correctly, the light sequence will change from green-yellow-green. This indicates that the password is cleared, and the device is restored to factory settings.
10. User Tips
- Tuya App Re-pairing: If you change your smartphone or reinstall the Tuya app, you may need to re-pair the padlock with the new app installation. In some cases, a factory reset might be required if the app fails to recognize the lock after a phone change.
- Battery Film: Always remember to remove the plastic insulating film from the batteries before first use to ensure the padlock powers on.
- Low Light Unlocking: The smart padlock is designed for easy unlocking even in low light environments, eliminating the need for external lighting.
11. Warranty and Support
This product is manufactured by Guangzhou Aicai Technology Co., Ltd.
Manufacturer Details:
Guangzhou Aicai Technology Co., Ltd.
Room 709, No. 68, Gangwan Road, Huangpu District, Guangzhou
The product is CE certified, indicating compliance with European health, safety, and environmental protection standards.
For detailed information, including comprehensive instructions and diagrams, please refer to the official user manual PDF: View User Manual (PDF)
For any questions or support, please contact your retailer or the manufacturer directly.