Bosa Toasty Grey Blackout Smart Battery Cassette
Cassette System | Blackout | Smart Home Automation | Battery Motorised
Add a touch of warmth to a classic grey with our Bosa Toasty Grey Cassette Blind. This inviting neutral is enclosed within our premium cassette system, ensuring superior blackout for bedrooms. Enjoy the convenience of full smart home integration.

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Key Features:
Fabric Type : Blackout
Fabric Composition : 100% Polyester
Motor Options : MotionBlinds or eveMotionBlinds
Hardware Colours : White or Black
Operation : Battery Motorised

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Free Fabric Sample
We want you to feel completely confident in your choice, so we encourage you to order fabric samples. Order a Free Fabric Sample today, and we'll send it via first-class post. You can request up to 10 samples at once, helping you find the perfect match for your space.

Not quite the colour you were looking for? Click here for our full range of Smart Cassette Systems.

Technical Specifications

Click here to download our full datasheet, which includes sizing charts along with component line drawings. 🤓

Our Blackout cassette blinds are designed first and foremost to provide darkness in a room by creating a sealed unit in or around the window.
To fit this blin,d you will be required to drill multiple holes, not just into the masonry you’re fitting to, but into the headbox and side channels themselves, as they don’t come pre-drilled. The reason for this is that you will need to ensure the entire blind sits squarely within a recess or against the wall, so you will need to decide where to specifically screw the blind to the wall.
The cassette blind is comprised of an aluminium headbox fascia in which the fabric on a barrel is held. Aluminium side channels run from top to bottom and are attached to the headbox. The fabric has fabric retaining pips attached to it, and these pips are what hold the fabric in the side channels.

Important: When the blind is in operation, the window must be shut. Failure to close the window when the fabric is anywhere but fully rolled up can cause the fabric to be pulled out of the side channels. This can damage the fabric or the side channel and the warranty will be voided. Do not operate this blind with an open window. If you install this blind on behalf of someone else, please inform them.

At the bottom of the fabric is the bottom bar that has a pile seal on the bottom of it. This helps to form a barrier against light at the bottom of the window when it sits on the bottom fixing strip.
The side channels measure 55.3mm wide, and if recess fitted, the side channels are 29.5mm deep, and if face fitted, they are 25.2mm deep. Please note that recess-fit side channels cannot be used for face fitting, and vice versa as they are different.
The bottom fixing strip is 25mm tall and 21mm deep and will match the chosen hardware colour. This L-shaped metal strip allows the bottom bar to sit just in front of it, thus creating another barrier between the window and the room.

The hardware is available in white or black and the motor is concealed within the barrel of the blind and has an inbuilt receiver. These motors are charged by a USB C charging point located at the end of the blind.

We expect our cassette blinds to provide darkness in your room for standard use. However, we are not able to guarantee absolute darkness due to differences in installation, location and light direction. Every care and attention has been made to engineer this type of blind to give maximum levels of darkness.

Click here to download our full datasheet which includes sizing charts along with component line drawings. 🤓

Blackout Chain Controlled Roller Blind Cassette System in Action

What is a Smart Blind?

The quick and easy explanation is that a smart blind is a motorised window blind which can be opened and closed remotely, without the need for the user to have a cumbersome remote on hand or to manually operate the blind.

However, that is really scratching the surface of why our smart blinds are so “smart”. If you’ll allow us to geek out for a moment, an item is “smart” when it is: active, networked and can be used autonomously – That’s a lot of big words, but boiled down it means that for our blinds to be “smart blinds” they need to: be actively ready to operate at any given time for the user’s convenience; has the capability to network and connect with other smart devices and be operated from anywhere with a Wi-Fi connection allowing for seamless use wherever you are; and having an ability to operate autonomously without human intervention, allowing the blind to provide perfect shade without the user having to even think about the blinds themselves.

Beyond that, we also believe that for our smart blinds to be truly “smart”, they should provide utility for their users providing a level of convenience, comfort, security and energy efficiency.

What's the difference in MotionBlind vs EveMotionBlind?

What they share

• Smooth, quiet blind control for everyday use.
• Quick, app-based setup with clear on-screen steps.
• Convenient USB-C charging (use the same cable as modern phones/tablets).

The key difference: how they connect (and who they work with)

• Motionblinds — Local Bluetooth control via the Motionblinds app. Add the Motionblinds Wi-Fi Bridge for Google/Alexa/SmartThings voice control and away-from-home access.
• Eve Motionblinds — Built on Thread + Matter. Works natively with Apple Home and also with Google Home, Amazon Alexa, and SmartThings when a Thread border router is present.

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Which should I choose?

• Choose Motionblinds if you want simple app control today and you’re happy to add a small bridge for voice control/remote access later.
• Choose Eve Motionblinds if you want the most seamless multi-platform setup now—Thread offers fast response, robust mesh coverage, and broad compatibility without a dedicated Wi-Fi bridge.

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Good to know

• Both options are quiet, quick to set up, and charge via USB-C.
• For larger homes or thicker walls, a centrally placed Wi-Fi Bridge (Motionblinds) or additional Thread border router(s) (Eve) can improve reliability.

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Examples of Thread Border Routers

Apple (Home)

• HomePod mini
• HomePod (2nd gen)
• Apple TV 4K (2nd gen, 2021)
• Apple TV 4K (3rd gen, 2022) — Wi-Fi + Ethernet model

Google (Google Home)

• Nest Hub (2nd gen)
• Nest Hub Max
• Nest Wifi Pro (Wi-Fi 6E)
• Eligible eero models linked to Google Home (where supported)

Amazon (Alexa)

• Echo (4th gen)
• Echo Hub
• Echo Show 8 (3rd gen) / Echo Show 10 (3rd gen)
• Echo Studio (1st & 2nd gen) / Echo Plus (2nd gen)
• eero routers with Thread (e.g., eero 6/6+/Pro 6/Pro 6E, eero 7/Pro 7/Max 7, Beacon, Outdoor 7, PoE 6/PoE Gateway)

Flash 20% Off Sitewide

Our Flash 20% Sale is here for a limited time only, running from 23/06/2026 until midnight on 30/06/2026. Enter code FLASH20 at checkout to enjoy 20% off all products sitewide. Discount applies to eligible orders placed during the promotional period only and the code must be entered at checkout to redeem the offer. The promotion ends at midnight on 30/06/2026.

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Terms & Conditions

20% off all products sitewide on eligible orders placed between 23/06/2026 and midnight on 30/06/2026 using code FLASH20 at checkout. The discount code must be entered at the time of ordering and cannot be applied retrospectively. The offer is valid on new orders only and applies during the promotional period only. The discount applies to product prices only and does not apply to delivery charges or any other non-product services. This offer cannot be used in conjunction with any other promotion or discount code. We reserve the right to amend or withdraw this promotion at any time.

How to Measure

Achieving high levels of darkness takes a bit of consideration, time and planning, and so click here for a PDF of our handy instructions to cast a bit of light on the matter. Download our Cassette Blind Measuring Guide here!

How to Install

Planning the installation of your Cassette Blind? Good call!

🛠 Click Here to download our nifty Cassette Blind Fitting Guide! 🛠

Buy Now Pay Later with Klarna

DotcomBlinds is pleased to be partnered with Klarna, providing you with more ways to pay.

At the checkout you will see Klarna provides two options: Pay in 3 Instalments or Pay Later.

Pay in 3 Instalments

With Klarna’s option to pay in three instalments, you can spread the cost of your purchase across three interest-free monthly payments.
To pay with Klarna’s ‘Pay in 3 Instalments’ option, you just need to be a UK resident over the age of 18 years old and have a valid payment card.

Pay Later In 30 Days

The second Klarna payment option you’ll find in the checkout is to buy now & pay later with their ‘Pay Later in 30 Days’ option at the checkout.
With this payment option, you make your purchase now and don’t pay until 30 days after we have shipped your product to you, giving you plenty of time to save up!
To pay with Klarna’s ‘Pay Later in 30 Days’ option, you just need to be a UK resident over the age of 18 years old and have a valid payment card.

If you have any questions, please don’t hesitate to get in touch with us.

Free Samples?

Free samples are available on all of our fabrics and slats. Simply click the ‘order free sample’ button.

Your free sample will be added to the basket ready for you to checkout. You can carry on browsing, adding up to 10 samples to your basket. When you’re ready, checkout – delivery is free too – and relax, our samples will be on their way to you in no time. When they arrive you'll find a handy label with the name and key features on the back of the fabric sample.

Why order samples?

We always recommend ordering samples to ensure you fall in love with the fabric or slat. Screen resolution and brightness settings vary and you may find some fabrics look a little different in real life to how they appear on a screen. You can hold a sample in your hands, feel the fabrics, the weave and see the opacity before your very eyes, something you can’t recreate online.

We’ve made every effort to accurately portray the fabric realistically, but you can never be too careful.

Quick Turnaround

We pride ourselves on the speed with which we can get your free fabric samples to you. We send your samples with first class delivery to be with you the very next day. We often dispatch them the same day you place your order (and most certainly by the next working day if you order after hours or on the weekend). With our fast free fabric sample delivery, you’ll be one step closer to shading your home with some of our fabulous blinds in no time at all!

3 Year Warranty

A blind from DotcomBlinds is made to the highest standards, designed to provide you with years of service and shade.
In fact, we’re so confident and proud of our blinds, we offer a 3 year warranty on all our blinds. This is one of the longest warranties available and a clear sign of the quality of our blinds.

Obviously, there are a few exclusions:
✖ Damage caused by poor installation/not following fitting instructions (don’t worry, installation is easy, read this.)
✖ Misuse or Failing to maintain the blind
✖ General wear and tear and fading (these blinds are exposed to very intense UV rays)
✖ Alteration to the blind
✖ Exposure to the elements or fitted in an unsuitable location (these are indoor blinds!)

However, if your blind stops functioning for any reasons other than those listed above, get in touch. Our warranty covers:
✔ Manufacturing defects
✔ Fabric/slat colour fading within a year
✔ Mechanical malfunction
✔ 2 year warranty on battery and mains electric motors used in electric roller blinds

So, in summary, avoid grossly mistreating your blind, show it a little TLC every so often and don’t use it in ways it wasn’t intended. If you do all those things and something goes wrong with the blind, you’re golden – we’ve got you covered and we’ll and repair or replace it free of charge.