Introduction
Thank you for choosing the Eseesmart Sliding Door Smart Lock YL-D300. This manual provides comprehensive instructions for the installation, operation, maintenance, and troubleshooting of your new smart lock. Please read this manual carefully before installation and use to ensure proper function and security.
Product Overview
The Eseesmart YL-D300 is a versatile smart lock designed for sliding glass doors, patio doors, and aluminum alloy doors. It offers multiple unlocking methods for enhanced convenience and security.

Image: Eseesmart Sliding Door Smart Lock YL-D300, showing the sleek black design and integrated keypad/fingerprint reader.
Setup and Installation
Careful installation is crucial for the optimal performance of your smart lock. Please follow these steps precisely.
Compatibility Requirements
Before installation, verify that your door meets the following specifications:
- Door Thickness: 13/15 inches to 4-3/4 inches (22mm to 120mm)
- Door Frame Width: Must be at least 1.6 inches (41mm) wide
- Ensure the 2085 Mortise lock is compatible with your door's existing mortise or prepare for necessary modifications.

Image: Diagram illustrating door thickness and frame width requirements for installation.

Image: Detailed dimensions of the 2085 Mortise lock and examples of compatible sliding glass, patio, and aluminum doors. Note: Extra drilling may be required.
Included Components
Verify that all components are present in the package:
- 1 x Sliding Glass Door Lock (All Parts)
- 1 x User Manual
- 1 x Screwdriver
- 2 x RFID Cards
- 2 x Mechanical Keys
Installation Steps
The lock features a reversible handle, allowing seamless use for both left and right-opening doors. Refer to the detailed diagrams in the included paper manual for specific drilling and mounting instructions.
- Prepare the Door: Ensure the door frame and mortise area are clean and free of obstructions. If replacing an old lock, remove it completely.
- Install the Mortise: Insert the 2085 Mortise into the door edge. Secure it with screws.
- Mount the Exterior Panel: Connect the necessary cables from the exterior panel through the door to the interior side. Position the exterior panel and secure it.
- Mount the Interior Panel: Connect the cables from the exterior panel to the interior panel. Align the interior panel and secure it to the door.
- Install Batteries: Insert 4 AAA batteries (not included) into the battery compartment of the interior panel.
- Test Functionality: After installation, test all mechanical and smart functions before closing the door.

Image: A person installing the Eseesmart Smart Lock, demonstrating the ease of the installation process.
Operating Instructions
The Eseesmart YL-D300 offers five convenient ways to unlock your door.

Image: Visual representation of the five unlocking methods: Fingerprint, Password, Card, Mobile App, and Physical Key.
1. Fingerprint Unlock
The lock features an AI fingerprint sensor for fast and secure access. It supports up to 300 users.
- Enroll Fingerprints: Follow the instructions in the mobile app to add new fingerprints.
- Unlock: Place your registered finger on the fingerprint sensor. The lock will unlock in approximately 0.2 seconds if the fingerprint is recognized.

Image: Details on the AI fingerprint sensor, highlighting 0.2s unlock speed, self-learning AI, and AES-256 encrypted chip for security.
2. Passcode Unlock
You can set up multiple types of passcodes, including regular and one-time codes. The anti-peep function allows you to enter random digits before or after your actual code to prevent others from guessing it.
- Set Passcodes: Use the mobile app to create and manage passcodes.
- Unlock: Enter your passcode (with or without anti-peep digits) followed by the '#' key.

Image: Illustration of the anti-peep password feature, showing how to embed your actual code within random digits, and icons for regular and one-time passwords.
3. RFID Card Unlock
Use the provided RFID cards for quick and easy access.
- Register Cards: Follow the app instructions to register the RFID cards.
- Unlock: Present the registered RFID card to the card reader area on the lock.
4. Mobile App Unlock
The Eseesmart lock can be controlled via a mobile application (e.g., Tuya app) for remote unlocking, managing users, and viewing access records.
- Download App: Download the recommended smart lock application from your device's app store.
- Pair Lock: Follow the in-app instructions to pair your smart lock via Bluetooth.
- Remote Unlock: From the app interface, press the unlock button. For remote unlock when not near the lock, press "9" + "#" on the lock keypad to activate remote unlock mode, then use the app.

Image: Overview of the mobile app's capabilities, including remote unlock, access logs, alarm notifications, and real-time battery status.

Image: A user initiating remote unlock via the mobile app after pressing '9' and '#' on the lock keypad.
5. Mechanical Key Unlock
In case of emergencies or battery depletion, you can always use the mechanical backup keys.
- Access Keyhole: Locate the hidden keyhole on the exterior panel.
- Unlock: Insert the mechanical key and turn to unlock the door.
Maintenance
Regular maintenance ensures the longevity and reliable operation of your Eseesmart smart lock.
Battery Management
The lock is designed for low power consumption, offering up to 8 months of battery life on 4 AAA batteries.
- Low Battery Warning: The lock will provide an audible and visual warning when battery levels are low. Replace batteries promptly.
- Emergency Power: In case of complete battery depletion, connect a power bank via the Type-C emergency charging port on the exterior panel to temporarily power the lock.
- Battery Type: Use 4 AAA alkaline batteries. Do not mix old and new batteries or different battery types.

Image: Features related to battery life, including 8-month standby, low battery alarm, emergency Type-C charging port, and mechanical key backup.

Image: Close-up of the Type-C emergency charging port on the smart lock.
Cleaning
To maintain the appearance and functionality of your lock:
- Wipe the lock surface with a soft, dry cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish and electronic components.
- Keep the fingerprint sensor clean and dry for optimal performance.
Durability and Environmental Conditions
The Eseesmart YL-D300 is built for durability and can withstand various environmental conditions.
- Waterproof Rating: IP65, providing protection against dust and low-pressure water jets.
- Operating Temperature: -13°F to 149°F (-25°C to 65°C).
- Lifespan: Designed to endure 15,000 lock/unlock cycles.
- Weight Test: Passes a 250 lb weight test.

Image: The smart lock shown with water droplets, illustrating its IP65 waterproof rating, alongside icons for operating temperature range, lock/unlock cycle lifespan, and weight test.
Troubleshooting
If you encounter issues with your smart lock, refer to the following common problems and solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Lock does not respond | Dead batteries | Replace batteries or use Type-C emergency power. |
| Fingerprint not recognized | Fingerprint sensor dirty; unregistered fingerprint; improper placement | Clean sensor; ensure finger is registered; place finger flat on sensor. |
| Passcode not working | Incorrect passcode; anti-peep digits not used correctly | Verify passcode; ensure correct entry sequence with anti-peep digits. |
| App cannot connect to lock | Bluetooth off; app not paired; lock out of range; app glitch | Ensure Bluetooth is on; re-pair lock in app; move closer to lock; restart app/phone. |
| Lock makes an alarm sound | Low battery; multiple incorrect entries; attempted forced entry | Check battery level; use correct unlock method; investigate for tampering. |

Image: A visual representation of the lock's intrusion-proof alert system, showing a red alarm icon over a person attempting to tamper with the lock.
Specifications
| Feature | Detail |
|---|---|
| Brand | Eseesmart |
| Model Number | YL-D300 |
| Lock Type | Sliding Glass Door Lock |
| Unlocking Ways | 5-in-1 (Fingerprint, Passcode, Mobile App, RFID Card, Mechanical Key) |
| Material | Zinc |
| Color | Black |
| Item Dimensions (L x W x H) | 1.26 x 0.9 x 12.6 inches (32 x 23 x 320 mm) |
| Item Weight | 4.75 Pounds |
| Recommended Door Thickness | 13/15" to 4-3/4" (22mm to 120mm) |
| Recommended Door Frame Width | ≥1.6" (41mm) |
| Connectivity Protocol | Bluetooth |
| Control Method | App (Android, iOS) |
| Waterproof Rating | IP65 |
| Operating Temperature | -13°F to 149°F (-25°C to 65°C) |
| Battery Life | Up to 8 months (4 AAA batteries) |
Warranty and Support
Eseesmart is committed to providing reliable products and excellent customer service.
Warranty Information
- Product Warranty: 24-month warranty from the date of purchase.
- Replacement/Refund: 12-month replacement or refund service for eligible issues.
Technical Support
We offer lifetime free technical support for your Eseesmart smart lock. If you have any questions, require assistance with installation, operation, or troubleshooting, please do not hesitate to contact us.
- Email: esmartlock@outlook.com




