Double-Sided Smart Lock

Name: Double-Sided Smart Lock
SKU: DFF-SP
Price: 299.99 GBP
Availability: InStock

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£150.00 /Lock (VAT included)

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Unlock the Power of Simpled Smart Lock

Ever forgotten or lost your keys? Wonder if you locked the door on your way out? Or returned all the way home just to let someone in? Simpled Smart Locks take any worry out of accessing your property. Use our top-rated app to control your door to unlock, grant guest access, see who came and left, and let anyone in from anywhere.

No more

waiting behind doors!

No more

waiting behind doors!

Features

The inside panel is not weatherproof and it is recommended to use it indoors to prevent damage from exposure to moisture or water.
Fits most existing handle-up multipoint mechanisms
24 months warranty
Handles are reversible, left or right, no problem!
Auto-Lock feature – No guesswork, No doubt! It will lock it for you!
Share Timed eKey or Passcodes; managing an AirBnB suite has never been easier
Passage Mode – When this mode is turned on, the door remains unlocked after the next unlocking until you actively choose to re-lock it.
NOT compatible with multipoint locks with offset spindles. Want to make sure? Take a video/picture and share it on our live chat or contact us page.

Technical Characteristics

Model: DFF-SP
Materials: Handle: Stainless Steel 304, Panel: Aluminum alloy
Lock Weight: 2.5 KG
Unlocking method from inside: App, Fingerprint, Remote controller, Fob/ Sticker
Unlocking methods from outside: Bluetooth, Fingerprint, Password, Proxy Fob / Sticker, Emergency Key, Alexa (WiFi Bridge is needed), Google home (WiFi Bridge is needed)
Emergency key access — for the outside handle
Colour: Silver
Bank-level encryption: Every Simpled smart lock features robust 128-bit AES protection
Low Battery Alarm: Less than 4.8 v
Doors Applicable: Aluminium Door, Wooden Door, UPVC doors, etc
Working Voltage: 6V/4 x AA Batteries (Energiser Lithium AA Batteries are recommended)
Door Thickness to Fit: 40-60mm
Dimensions:-External panel (without handle): Height: 300mm, Width: 38mm, Length: 23mm-External panel (with handle): Height: 300mm, Width: 134mm, Length: 72mm-Internal panel (without handle): Height: 300mm, Width: 38mm, Length: 23mm-Internal panel (with handle): Height: 300mm, Width: 134mm, Length: 72mm* For more clarity, check the specification image.
Data Capacity: Fingerprint: 200, Passcode: 150, Fob: 200, Remote Controller: 1, eKeys (smartphone access): Unlimited
Working Temperature: -10°C-55°C

Shop with confidence with Simpled 2-year guarantee.

Free Delivery and Return: Arrives by 12 Feb - 13 Feb, if you order within 14hrs 12mins

Delivery and return policies: Estimated arrival 12 Feb - 13 Feb

10 Feb

Order Placed

12 Feb

Dispatched from Warehouse

12 Feb or 13 Feb

Delivered

Hi there, We are currently working on that. But customers reported that they had shared the data spec with their insurance companies, giving the green light to their upgrade. We highly recommend asking your insurance company before placing an order until we gain approval.
Does the double sided lock have any British Standard Kitemark and approval from the Association of British Insurers?

Buy it with

Buy All Items

Double-Sided Smart Lock Original price was: £350.00.Current price is: £299.99.

Simpled Door Sensor Original price was: £28.00.Current price is: £24.99.

Simpled TG WiFi Gateway Original price was: £56.00.Current price is: £42.50.

Total Price: £367.48 (Save £66.52 )

Double-Sided Smart Lock

Frequently Bought Together

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Simpled 4585 Mortice (45mm backset)

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Simpled Ta-sp Bluetooth Remote Controller

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DFA Covering Repair Plate - compatible with EF,DFF and SS - Black

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Simpled 3585 Mortice (35mm backset)

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Simpled Fob Door Lock - Pack of 4 (SA-SP)

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CSA-SP Slim Series Cover Plate

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Extended Warranty

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Simpled Door Sensor

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Longer Screws and Spindle for EF and DFF - 80mm

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Simpled TG WiFi Gateway

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FAQ

Why should I buy an electronic door lock?

A: We would like to counter-question some of your experiences with your own door locks. Do you remember a time when you forgot your keys and was locked out of your home? What happens when you arrive home late and depend on someone (parents/maid) in the house to open the door for you? Do you wake them up? You invited your best friends/family members to your house, but you were running late, and they are already at your gate. Wouldn’t it be nice if they can enter your home instead of waiting aimlessly outside? Have any of your belongings been scratched/damaged through keys in the same bag/pocket? If you have experienced the above scenarios, it may be time you installed an electronic door lock. With an electronic door lock, you will be able to open your gates without using keys (fingerprint/RFID tag/pin codes and even your smartphone).

I have little kids and don't want them to open the door without permission; how can I keep it locked inside?

The good news is that our Double-Sided door handle can be locked from the inside and unlocked from the inside only using the app, a Remote Controller, fingerprint, and Fob/tag.

What type of doors can a digital lock be fitted on?

Simpled smart locks can be installed on most main doors and gates Materials such as wooden, metal, plastic, sliding doors and glass You can send your existing door/gate photos for further assistance to our support team at [email protected].

My batteries have completely run out. What can I do?

There are two solutions: Physical Keys Physical keys are provided together with Simpled smart locks, which ensures that you will still be able to enter the house mechanically even if its batteries run out. It is strongly recommended to keep at least one spare key on you or a family at all times for such situations. USB Input Also, when the physical key is not available, there is a USB input on the bottom part of the smart locks (besides the key input) that enables you to connect a power bank to wake up the lock and unlock it.

What happens to my smart lock during an electrical blackout?

As the Simpled digital locks run on batteries, they will work regardless of a power trip or blackout.

The touchscreen of the lock seems reflective. Can fingerprints be left on the lock, making it easy to guess the password?

Simpled locks come with an imaginary PIN code feature that allows you to enter other digits before/after your actual PIN. This is optional but will help to deter hackers and prevent your PIN code from being exposed. Also, with the security lockout mode, it is even more difficult to guess your PIN code.

What happens if I lose my physical key?

For security purposes, our physical keys are designed unique to your lock ID, and we do not have spares of their respective physical keys. We recommend keeping a key with a trusted family member from the first day. The lock can still be unlocked via other means based on your lock model, i.e. smartphone unlock, fingerprints, pin codes, etc

Where can I find the user manual?

The user manual is available at Support > Downloads from our website

Which door lock is suitable for my usage?

Type of Door Locks This is really down to your personal preference. Typically, most models come with pin code and biometric or pin code and RFID access, except for the Leo Max smart lock, which incorporated all 3 elements (Face and Palm Recognition, pin code and RFID access).

What is the warranty period for Simpled smart door locks?

All product(s) sold by simpled.tech or our authorised dealers come with a 24-month local warranty to the original purchaser Valid from the date of purchase

Where can I purchase Simpled smart door locks?

Purchase directly on our website For more enquiries, please contact us. Amazon website

Do Simpled products come with a warranty?

Sure. Most of our products are sold with a warranty of two years provided by the Simpled headquarters in London.

Who is Simpled?

Simpled, a London-based company, rolling out an expanding range of innovative household devices to simplify and elevate the smart home experience.

How long does delivery take?

Delivery to the UK typically takes 1 to 4 working days for your purchased items to arrive.

What's the app?

It's TTlock app. You can find it on both Google Play and App Store.

Download from App Store:

Download from Google Play:

How far away can the hub be?

It will be connected to the lock via Bluetooth. So it's ideally around 10 meters. However, the maximum communication range will vary depending on obstacles (person, metal, wall, etc.) or electromagnetic environment.

Does it include the Gateway? Do I need a Gateway?

Normally, this smart lock doesn't come with a gateway. You need to add that to the basket. It's good to know that Without Gateway, you can still: See who access the lock with their smartphone Share keys with your family, friends, maid or dog walker Open your lock using your smartphone or smartwatch Limit other's access or even delete theirs With Gateway, you will be able to: Open your lock from anywhere Remotely read the lock operation, including fingerprint, tags, password Use it with your Alexa Add to Cart Only £56.00

I recently purchased 4 new locks. Isn't there a shortcut to add the old data on the new locks?

1. Choose the new lock on the app. 2. Tap on "Setting" 3. Select "Import from another lock" 4. Choose your old lock from the list. There we go!

Does it have NFC?

Not on all smartphones. Some are using encrypted NFC, and it won't be compatible with the lock. In some regions, people can pair transportation cards on their phones with the Simpled smart locks. In some other countries, it's not possible.

I'm throwing a party. I want to leave the door open for the guests! Should I give access to everyone?

Not necessarily. You can use the passage mode feature for a specific time! In that period, the automatic-lock feature will be disabled. You can still manually lock it with a long-press #.

Can I share administrator access with my partner?

Sure, you can. You can share admin access with a trusted family, friend, employee. Or you can just share limited access!

Isn't voice command on Alexa a bad feature? Anyone in my home has access to open the door?

That's the point. It's for easier access of the people inside. You trust them. Don't you? Even if you don't, there's a pin code that should be announced after a command, and that's what not everyone has!

Can I use it for my AirBnB flat/Hotel?

Sure, it's designed to help you manage your property more conveniently thanks to features like passcodes, eKeys, and even Fingerprint for extended stays! We also have a web application with all the necessary features for managing a property remotely!

Can I use my bank cards to open the lock?

Some contactless cards from some banks are compatible. For example, Lloyds Bank, Tesco Bank cards can be registered on Simpled Locks.

I bought two different Simpled Smart locks for the entrance and my room. Can I use the same contactless fob(/phone tag) to unlock them both?

Sure. Simpled Tags can be programmed on all Simpled smart locks.

Are both sides of the handle weatherproof and suitable for use on gates?

No, only the outside panel is weatherproof, The inside panel is not weatherproof and it is recommended to use it indoors to prevent damage from exposure to moisture or water.

Customer Reviews:

“

Great company that care. I used them on my first airBnB property and have now rolled them out to two more. The after sales service is what really stands out. Advice, spare parts, tech support all 100% 💪

”

Owen Werakso, 24 Jan 2026

“

Very reliable and support is fantastic. They have everything in order and you can feel it in their service and aftermarket. Different and refreshing with great products, highly recommended.

”

Elias Gadgets (Gary), 23 Dec 2025

“

Great smart lock. Absolutely brilliant after sales service.. I had some questions during installation. Simpled got back to me very quickly and talk me through it.

”

foysol hussain, 24 Nov 2025

“

My door lock is brilliant especially the finger print option for entering . The customer service was exceptional. Would recommend this company first class service

”

Karen Humphreys, 13 Oct 2025

“

Absolutely first-class service from Simpled. I ordered a lock, and it was delivered the very next day. I carried out an installation of the lock the same day, and followed the guidelines and extremely easy-to-follow videos produced by Simpled. Installation was very easy on my multi-lock door. Setting up with the TT Lock app was […]

”

C “Chris” T, 30 Jun 2025

“

Sales enquiry by telephone was most helpful and provided the information I needed to make a decision on purchase and selection of the correct equipment. Installation was simple and could have been quicker but I was taking my time to get it right. I spent an hour installing and programming in total, but next time […]

”

Mark Hitchin, 08 Oct 2024

“

Simpled are an excellent company selling a state of the art product. I looked for ages to find a door lock that could be locked automatically and opened remotely. It does just that. (hub and internet required) I now never worry about the office being left unlocked and it is always secure. I can unlock […]

”

Darron Nixon, 04 Oct 2024

“

Nice company to deal with and great well thought out locks. Lots of features and modern look. Good after sales service. Would recommend.

”

Terry Rimmer, 03 Oct 2024

“

I bought a simpled lock early 2022, I’ve been delighted with it for the past 2 years. It’s easy to install, decent batteries lasted me 1 year, what a great product. The tech really is excellent. Unfortunately it failed late 2024, I called the helpline, who advised they could send the replacement parts out to […]

”

Adam Burtt-Jones, 01 Oct 2024

Sam Carter

“

Great products & great service! We love the keypad locks we purchased for two of our AirBnBs in our converted church! One of them stopped working and as it was still 1 week within the 2 year warranty, they honoured it and sent a brand new part the next day! Thank you so much :)

”

Sam Carter, 27 Sep 2024

EXCELLENT

Simpled Tech Limited

Based on 60 reviews

Reviews

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Write a Review

s.kamyabi November 17, 2024

Hi there, We are currently working on that. But customers reported that they had shared the data spec with their insurance companies, giving the green light to their upgrade. We highly recommend asking your insurance company before placing an order until we gain approval.
Phil Howells November 16, 2024

Does the double sided lock have any British Standard Kitemark and approval from the Association of British Insurers?
s.kamyabi October 28, 2024

Hello there, This lock will not secure the door from the inside unless you lift the handle upward. Once it is locked from the inside, you can only unlock it using the app, a fingerprint, or a remote controller. This design is intended for those who may need extra security, such as families with young children, elderly parents, or very clever pets that can open doors. In contrast, our Slim series locks (EF, SF, SF-SPS) do not have an interior locking mechanism, allowing for quick exits when needed.
Matthew October 27, 2024

I am wondering how the lock works in an emergency situation. Most homes front doors are the fire escape route, as there is no internal thumb turn on the dff lock how would you open the door in emergencies. It’s not suitable in emergencies to be searching around for a key fob.
s.kamyabi May 29, 2024

All of Simpled key fobs are mifair ,13.56MHz.