Read more
Smart Biometric Security for Travel, Gym, and Everyday Use
Traditional padlocks come with a common headache: keys that get lost and combinations that get forgotten. The ULS3 Silver Fingerprint Padlock changes the game by offering a keyless, secure, and convenient locking solution for modern users. Whether you need to secure a locker, luggage, backpack, or cabinet, this smart lock delivers reliable protection with cutting-edge biometric technology.
In this comprehensive guide, we cover everything you need to know about the ULS3, including its specifications, features, how to use it, what is inside the box, and answers to frequently asked questions.
📋 ULS3 Technical Specifications
| Specification | Details |
|---|---|
| 🔹 Model | ULS3 |
| 🔹 Material | Zinc Alloy + Stainless Steel |
| 🔹 Dimensions | φ25.5 × 75 mm (Compact & Portable) |
| 🔹 Color | Silver |
| 🔹 Bluetooth Standard | Bluetooth 5.1 |
| 🔹 Supported OS | Android 4.4+ / iOS 7.0+ |
| 🔹 Power Supply | Built-in 120mAh Lithium Battery |
| 🔹 Standby Time | Up to 120 Days |
| 🔹 Charging Voltage (USB) | 5V (Standard USB only — avoid fast-charging adapters) |
| 🔹 Charging Current | 100mA |
| 🔹 Low Battery Alert | 3.5V (Red light flashes after unlocking) |
| 🔹 Voltage Range | 3.3V – 4.2V |
| 🔹 Standby Current | 30μA |
| 🔹 Operating Current | <300ma td=""> |
| 🔹 Operating Temperature | -20°C to 70°C |
| 🔹 Unlocking Methods | Fingerprint, App (Tuya) |
| 🔹 Fingerprint Capacity | 20 Fingerprints |
✨ Key Features & Benefits
🔒 Fingerprint Security You Can Trust
The ULS3 uses advanced biometric technology to ensure only authorized fingerprints can open the lock. With a capacity of 20 fingerprints, you can grant access to family members, friends, or colleagues without worrying about lost keys or shared combinations.
📱 Dual Unlocking: Fingerprint + Bluetooth App
Choose how you want to unlock. Use the quick fingerprint sensor for one-touch access, or use the Tuya Smart App via Bluetooth 5.1 for remote unlocking. This is especially useful when your fingers are wet, dirty, or when wearing gloves.
🛡️ Premium Build Quality
Constructed from zinc alloy and stainless steel, the ULS3 is designed to resist physical tampering and harsh environmental conditions. It operates reliably in temperatures ranging from -20°C to 70°C, making it suitable for both indoor and outdoor use.
🔋 Long Battery Life
Equipped with a built-in 120mAh lithium battery, the ULS3 offers an impressive standby time of up to 120 days on a single charge. The low battery alert (red light flashing at 3.5V) ensures you are never caught off guard.
🎯 Versatile Usage Range
The compact design (φ25.5 × 75 mm) makes the ULS3 perfect for a wide variety of applications including gym lockers, luggage, backpacks, cabinets, toolboxes, and more. It is your all-in-one security solution.
📖 How to Use the ULS3 Fingerprint Padlock
Step 1: Initial Charging
Before first use, charge the lock using the included USB cable. Connect it to a standard USB port (5V). Important: Do not use fast-charging power sources as they may damage the battery. A full charge ensures optimal performance.
Step 2: Download the Tuya Smart App
Download the Tuya Smart App from the Google Play Store or Apple App Store. The app is compatible with Android 4.4+ and iOS 7.0+. Create an account or log in if you already have one.
Step 3: Pair the Lock via Bluetooth
Open the Tuya Smart App and enable Bluetooth on your smartphone. Follow the in-app instructions to add a new device. The app will search for the ULS3 lock. Once found, tap to connect. The lock uses Bluetooth 5.1 for a stable and fast connection.
Step 4: Register Fingerprints
Using the app, navigate to the fingerprint management section. Follow the prompts to register each fingerprint. Press your finger on the sensor multiple times to ensure a complete scan. You can register up to 20 fingerprints.
Step 5: Unlocking
To unlock, simply press a registered finger firmly on the fingerprint sensor. The lock will beep and open within seconds. Alternatively, you can unlock using the app via Bluetooth connection.
📦 What's in the Box?
1 × Fingerprint Padlock (Silver)
1 × Standard USB Cable
1 × Instruction Guide
❓ Frequently Asked Questions (FAQ)
Q: How long does the battery last on a single charge?
The built-in 120mAh lithium battery provides up to 120 days of standby time under normal usage conditions. Actual battery life may vary depending on frequency of use.
Q: Can I use a fast charger to charge the ULS3?
No. The ULS3 requires a standard 5V USB charging source with a maximum current of 100mA. Using fast-charging adapters may damage the internal battery and void the warranty.
Q: How many fingerprints can be stored?
The ULS3 can store up to 20 individual fingerprints, allowing multiple users to access the lock with their unique biometric data.
Q: What happens when the battery is low?
When the battery voltage drops to 3.5V, the lock will flash a red light after unlocking as a low battery alert. It is recommended to recharge the lock promptly to avoid being locked out.
Q: Is the ULS3 waterproof?
While the ULS3 is constructed from durable zinc alloy and stainless steel and can withstand a wide temperature range (-20°C to 70°C), it is recommended to avoid prolonged submersion in water.
Q: What can I use this lock for?
The ULS3 is extremely versatile. It is ideal for gym lockers, travel luggage, backpacks, school lockers, toolboxes, cabinets, and even outdoor gates (within the operating temperature range).
🏆 Final Verdict
The ULS3 Silver Fingerprint Padlock is an excellent investment for anyone seeking a modern, keyless security solution. Its durable build, long battery life, dual unlocking methods, and generous fingerprint capacity make it a standout product in the smart lock category. Whether you are a frequent traveler, a gym-goer, or simply someone who values convenience and security, the ULS3 delivers on all fronts.
Highly recommended!
0 Reviews
Please refrain from spamming YTshop team will review your comments