Fingerprint Password Smart Door Locks LS-C91

Product information

Users who upgrade old locks need to pay attention to the following points:

1，Multi-directional measurement of old locks.(refer to the picture example)

1-1. Measure the size of the old lock panel.

We have many different sizes of smart locks, please refer to the product details for details, make sure the size of the smart lock you choose can replace the old lock. (1. New doors do not need to consider this. 2. Double-hole American doors recommend C87/C88 with traditional mechanical door handles)

1-2. Measure the distance between the center point of the old lock's mechanical keyhole and the edge of the door.

Models we support are:20xx，25xx，28xx，30xx，35xx，40xx，45xx，50xx，60xx，65xx，70xx，75xx.

1-3. Measure the distance between the center point of the old lock handle and the mechanical key hole.

Models we support are:xx50，xx68，xx72，xx85.*Single-tongue(#DS) lock bodies are not affected.

1-4. Measuring the old lock Mortise faceplate size.

*Mortise faceplate supports the 5050 lock body size of 145*23mm.
*default Mortise faceplate size for other lock bodies is 230*23mm.
*Single-tongue(#DS) lock bodies are not affected.
Please contact Locstar for manual processing after purchasing Mortise faceplate of other sizes! !

2，Measuring the thickness of the door. (refer to the picture example)

Door thickness we support is around 35-120mm. If your door thickness does not meet this requirement, please contact Locstar staff after purchase. They will manually adjust the screw length to ensure that the product can be installed and used normally after receipt!

3，Determine the direction of the lock handle. Right handle(A/B) Left handle(C/D). (refer to the picture example)

Currently, only the 8058/8072 models require confirmation of the handle installation direction before shipment. Other models do not require confirmation. We will upgrade and solve the problem as soon as possible!

When you visit here, I believe you must know some key data of your old lock, such as the size of lock panel,lock body model,Mortise faceplate size,door thickness, etc. After knowing these relevant information, you can choose the door lock that suits you. Of course, our installation is also very simple. We have a free manual. You can search Locstar on YouTube to check the door lock related videos. Remember to follow and subscribe to us. I believe you can also become an excellent locksmith.

Here, let us start a new smart extraordinary experience together! !

Locstar official team.

✔️ Backset
Distance between the edge of the door and the centre of the door lock.

✔️ Door Stile/Frame
The door stile/frame is the flat surface area where the smart door lock is mounted, and the minimum door stile refers to the minimum surface area required for a specific lock. Check the 'Fitment' section of each lock to find its minimum door stile requirement.

✔️ Mortise/Mortise Lock
A type of lock that is installed within a door, with the lock body embedded or recessed into a mortise pocket within the door. A mortise lock size usually refers to the Backset of that specific mortise.
For example, 'Swing - 28mm' = Mortise lock with a 28mm Backset for a Swing Door.

✔️ Latch
A spring-loaded mechanism that keeps the door closed when engaged and can be released by turning a doorknob or lever.

✔️ Deadbolt
A bolt that extends into the door jamb to prevent the door from being forced open.

✔️ Striker Plate/Strike Plate
The a metal plate that is installed on a door jamb or frame where the door latch or deadbolt extends into to keep the door securely closed.

✔️ Strike Box
The strike box is the plastic box installed behind the strike plate and is attached to the door frame with screws. When the door is closed, the latch or bolt on the lock extends into the strike plate box.

✔️ Keyless Entry
A feature that allows users to unlock a door without using a traditional key, typically using methods such as numeric keypads, fingerprint, or smartphone apps.

✔️ Keypad Entry
A type of keyless entry system that utilizes a numeric keypad for entering a PIN code to unlock the door.

✔️ Bluetooth Connectivity
A wireless communication technology that enables the smart lock to connect and communicate with other devices, such as smartphones or tablets. Bluetooth is short-range and usually about 3-7 meters.

✔️ Wi-Fi Connectivity
A wireless networking technology that allows the smart lock to connect to the internet, providing remote access and control capabilities.

5-IN-1 Unlock Method

A variety of unlocking methods, try more possibilities

Product Details

Upgrade your home security with the LS-C91 Fingerprint Password Smart Door Lock. Featuring fast fingerprint recognition, PIN code access, and mechanical key backup, this smart lock ensures convenient, keyless entry with military-grade encryption. Perfect for modern homes, it offers auto-locking, tamper alerts, and durable construction.

✅ Biometric & PIN access
✅ Auto-lock & anti-peep design
✅ Easy installation & low power consumption
✅ IP65 waterproof & durable

Enjoy smart, secure access with the LS-C91—your ideal keyless door lock for homes, offices, and rentals.

Product Name	C91 Smart Lock
Unlock type	APP/ fingerprint/ password/IC card/key/Bluetooth/WiFi
Material	Aluminum Alloy
Mortise	DS/5050/5072/4585/5085/6085
Size	310193110mm
Fingerprint Type	FPC 160X160
power supply mode	4*AA battery
Fingerprint capacity	200pcs
Password Capacity	200pcs
Key Quantity	2pcs
Card quantity	2pcs
Color	Black/Red bronze
Supported door thickness	1.49-2.5 inch，（>2.5 inch, please contact Locstar staff!）

Installation

Can I install the LS - C91 Smart Lock by myself?

Yes, the LS - C91 is designed for easy DIY installation. The package comes with detailed installation instructions. However, if you're unsure about the process or lack the necessary tools, it's advisable to hire a professional locksmith.

What tools do I need for installation?

Typically, you'll need a screwdriver, a drill (if necessary for mounting), and a measuring tape. The specific tools may vary depending on your door type and existing lock setup.

Does the LS - C91 fit all types of doors?

The LS - C91 is compatible with most standard wooden doors, metal doors, and apartment entrance doors. But it's crucial to check the door thickness requirements before purchase. Generally, it fits doors within a certain thickness range, usually around [X] - [X] mm.

Unlocking and Access

How many ways can I unlock the LS - C91 Smart Lock?

The LS - C91 offers 8 advanced unlocking methods:

WiFi Unlock: Control access remotely via WiFi when the lock is connected to your home network.

Bluetooth Unlock: Unlock your door using Bluetooth connectivity on your smartphone.

App Unlock: Use the TTlock and Tuya apps (compatible with both iOS and Android devices) for easy access.

Fingerprint Unlock: Benefit from secure and fast fingerprint recognition. It can store up to 120 fingerprint templates.

Password Unlock: Enter a custom - set password for entry. There are options for custom and permanent passwords (up to 150), as well as other dynamic passwords (up to 150).

Card Unlock: Use a magnetic card (Mifare M card) for seamless unlocking, with a capacity of 200 cards.

Key Unlock: Traditional key access is available for emergencies.

Combination Unlock: Enhance security by combining multiple methods, like using a fingerprint and a password together.

How do I set up a new fingerprint for unlocking?

Open the relevant app (TTlock or Tuya). Navigate to the fingerprint registration section. Follow the on - screen prompts, which usually involve placing your finger on the fingerprint scanner multiple times at different angles to ensure accurate registration. The lock uses a semiconductor fingerprint head for high - accuracy recognition.

Can I create temporary access codes for guests?

Yes, through the app, you can generate temporary access codes. These codes can be set to expire after a specific time, such as during the duration of your guest's stay. This is a convenient way to grant access without sharing your permanent codes or keys.

Power and Battery

How long do the batteries in the LS - C91 last?

The LS - C91 is powered by 4 alkaline dry batteries. Under normal usage conditions, the battery life can last up to 12 - 18 months. However, this may vary depending on the frequency of use and the number of unlocking methods utilized.

What should I do when the battery is low?

The lock has a low - voltage alarm. When the battery voltage drops to around 5V, you'll receive a notification in the app, and the lock may also emit an audible or visual alert. It's recommended to replace the batteries as soon as possible. In case of an emergency, if the battery completely dies, you can use the emergency power supply via USB. Connect a power bank to the lock's USB port, and this will provide enough power to unlock the door using your regular methods (card, fingerprint, password).

Can the lock work during a power outage?

Yes, since the LS - C91 is battery - powered, it continues to function during a power outage. The battery backup ensures that the locking mechanism remains operational, providing continuous security for your home.

تجربة رائعة ومتكاملة الارضاء

عندما قررت شراء C91 ، كنت في البداية قد جذبت بمهامله المذهلة والسرعة الممتازة. لكن ما حقاً تجاوز توقعاتي هو خدمة التخصيص التي قدمها الشركة المصنعة.
في لحظة وصول الشحنة ، كنت قد استघرب فوراً من التغليف الخارجي المصمم لتخصيصنا. كان شعار شركة بلدي معروضًا بشكل واضح ، وكان الألوان والأنماط في توافق مثالي مع صورة علامتنا التجارية. من الواضح أن الشركة المصنعة قد توجهت بالحرص الشديد على كل التفاصيل التي طلبناها.
لم أتردد في تسجيل تجربة فتح العلبة باستخدام الكاميرا. عندما كنت أفتح العلبة ببطء ، كان الشعور بالترقب متزايداً. كان التغليف الداخلي مثيرًا للدهشة بنفس القدر ، وكان الحفارة الفومية تحقق الحفاظ على C91 بشكل جيد أثناء النقل. كل قطعة وصفية كانت معروضة بشكل ، وكان الإظهار الكلي رائع الجودة.
أنا يجب أن أشكر بشكل كبير الفريق الخلفي. من الاستشارة الأولى حتى التسليم النهائي ، كان إحترافهم رائعًا. كانوا دائمًا يستجيبون لاستفساراتي وكانوا يضمنون أن كل خطوة في العملية تتم بسلاسة. أنا أقترح بشدة هذه الشركة المصنعة لأي شخص يبحث عن منتج يجمع بين الجودة القصوى وقابلية التخصيص. سواء كنت رايسًا للشركة مثلني أو فردًا بحاجة محددة ، فإنهم يستطيعون تلبية احتياجاتك. خمسة نجوم طوال المسار!

Very beautiful product, very good service

Cheap price good product

Because I didn't have much money, I contacted the store owner to buy other low-end door locks. There was a little misunderstanding when I received the goods. There were a few scratches and I thought I received a second-hand old lock. Finally, the merchant told me that there was a film on the surface. After tearing it off, it was perfect.

Pretty Easy to Install

like the ease of installation, value, appearance, performance and keys of the lock.instructions are easy to follow, it works great for the price and that it looks good.satisfied with fingerprint recognition, ease of use, and quality.