
Four Shelly BLU Door/Window sensors, two Shelly BLU Motion sensors and the BLU RC Button 4 remote report openings and movement around the house. The Shelly BLU gateway links them over Bluetooth to the Wi-Fi, with no control panel: notifications reach your phone from the Shelly app, where the alarm scenes are set up too.
What it does
- The BLU Door/Window sensors on the doors and windows send opening and closing to the gateway, which passes them to the Shelly app.
- The two BLU Motion pick up movement in the rooms people pass through.
- With the alarm scene on, an opening or movement sends a notification straight to the phone.
- The BLU RC Button 4 remote turns scenes on and off at one key: away, night, off.
- If there are Shelly lights or sockets in the house, the alarm scene can turn them all on when the door opens.
- The app logs the event history, so you can see when each door or window was opened.

How it is installed
What's in the kit

| Qty | Item | Unit price | Subtotal |
|---|---|---|---|
| 1 | Shelly BLU Gateway USBCoordinator / gateway | 19,99 € | 19,99 € |
| 4 | Shelly BLU Door/Window (CR2032)Opening sensor | 15,90 € | 63,60 € |
| 1 | Shelly BLU Motion, 2 piecesMotion sensor | 70,83 € | 70,83 € |
| 1 | Shelly BLU RC Button 4 (CR2032)Button / control | 13,94 € | 13,94 € |
| 1 | 5V 2A USB power supplies, 3 piecesAccessory: power · needed because the device comes without a power supply | 10,99 € | 10,99 € |
| Kit total | 179,35 € |
Recommended options
| Qty | Item | When you need it | Price |
|---|---|---|---|
| 1 | Spare CR2032 batteries, pack of 10 | spares for 5 CR2032 sensors | 6,92 € |
| Options total | 6,92 € |
Prices taken from Amazon.it on 22/09/2026: they can change, and the price Amazon shows at the time of purchase is the one that applies.
Add the whole kit to your Amazon basket5 items, 8 pieces · optional extras are added from the individual linksDelivery, returns and warranty: Amazon shows these when you buy.
Before you order
Do you need a hub?
You need the Shelly BLU gateway, which is included: it picks up the sensors and the remote over Bluetooth and links them to the Wi-Fi and the Shelly app. No alarm panel and no subscription are needed.
Is there a siren?
No: the kit sends notifications to your phone and triggers scenes, with no siren. If you have Shelly lights or plugs at home, they can switch on when the alarm goes off. To add a siren, get in touch through the contact page and we will point you to a compatible solution.
Does it work with Alexa, Google and Apple?
Yes with Alexa and Google Home, through the Shelly integrations, for the supported sensors. The alarm logic stays in the Shelly app. The devices also work with Home Assistant. Apple Home needs something in between, such as Home Assistant.
Do you need an electrician?
No: the gateway goes into the kit's USB power supply and the sensors are battery-powered, fixed with the adhesive. No cables are run and the installation is left untouched: you only have to choose the right positions.
What happens if there is no internet?
With no internet the notifications do not arrive and scenes that go through the Shelly service stop until the connection is back. If the power goes, the gateway goes off too: the kit has no backup battery.
Are batteries included?
The opening sensors and the remote run on a CR2032 button cell, the BLU Motion units on a button cell, as the manufacturer states. The kit includes a pack of spare CR2032 cells as an option.
Can I add more sensors?
Yes: more Shelly BLU sensors can be added to the gateway, for opening, motion, flooding or temperature, as long as they are within Bluetooth range. Large houses may need a second gateway or a Shelly Gen2 or Gen3 device acting as one.
What if a product is out of stock on Amazon?
Get in touch through the contact page quoting the kit code: we will point you to an alternative that works with the other parts, so the kit still performs as described. Do not swap a component for a similar model without first checking the protocol and whether it is compatible with the rest of the installation.
Why buy on Amazon?
Purchase, delivery, returns and warranty are handled by Amazon, under the terms you see when you order. The kit is our own work: the parts are chosen to work together and the basket adds them all, in the right quantities, in one go.
Notes
Not included
- A siren
- The router and the internet connection
- Connection to a monitoring centre
As an Amazon Associate, Litio Store earns from qualifying purchases.