# XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack

Pack: XINDUM SM11R4 is a three-alarm wireless interlinked smoke alarm set with a photoelectric sensor and a claimed 10-year standby battery life. If one alarm detects smoke, the listing says the linked alarms sound together. The listing also gives conflicting product descriptions, so confirm the exact alarm type and battery arrangement before buying.

- [Original product page](https://bargainpostbox.co.uk/product/xindum-sm11r4-interlinked-smoke-alarms-3-pack)
- [View offer](https://bargainpostbox.co.uk/visit/xindum-sm11r4-interlinked-smoke-alarms-3-pack)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: XINDUM
- Model: SM11R4
- Category: Electronics > Smart Home & Security > Alarms & Sensors
- Price: 37.80 GBP
- Previous price: 56.98 GBP
- Discount: 34%
- Price checked: 2026-11-12T15:09:42.507Z
- Rating: 4.4 / 5
- Reviews: 819

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Three smoke alarms are listed as included, with wireless interlinking described.
- The listing claims up to 30 alarms per group and a linkable distance of within 100m outdoors.
- A button press silences an alarm for 10 minutes, according to the listing.
- A green LED is described as flashing once a minute.

## Pros

- Interlinking is intended to alert occupants through all linked alarms when one detects smoke.
- A photoelectric sensor and a 10-minute silence mode are specified.
- The listing describes both screw and adhesive-pad installation options.

## Specifications

### Identity
- Brand: XINDUM
- Model: SM11R4
### Power and battery
- Power configuration: Battery Powered
### Detection and operation
- Sensor type: Photoelectric
- Maximum linked alarms: 30 pieces per group
- Linkable distance: within 100m outdoors
- Silence duration: 10 minutes
### Dimensions and installation
- Dimensions listed: 12D x 12W x 3.1H centimetres
- Weight listed: 135 Grams
### Materials and protection
- Material listed: ABS plastic
- Upper temperature rating: 40 Degrees Celsius

## Before you buy

- The listing is inconsistent about the product: the title and core details describe smoke alarms with two CR14505 batteries totalling 3200 mAh and over 10 years in standby, while other description text calls them heat alarms with a 1600mAh battery. Confirm the alarm type and battery configuration for the selected listing. The 10-year claim applies to standby operation, not an unconditional service-life guarantee. The advertised 100m link distance is specified outdoors.

## In the box

- 3 smoke alarms (Included)

## A good fit for

- Buyers seeking a three-alarm smoke detector set with wireless interlinking and photoelectric sensing.
- Homes where occupants may benefit from linked alarms sounding across separate rooms or floors.

## Less suited to

- Buyers who need confirmed heat-alarm functionality or a clearly specified battery configuration without checking the listing first.

## Customer feedback

Customer feedback describes the alarms as easy to install and praises their perceived quality, wireless interlinking and the usefulness of a remote control for testing and silencing. Some customers also report units stopping work after a month, so reliability is a material concern alongside the positive experiences. The feedback relates to the system, while the listing identifies this pack as three alarms and separately lists a compatible remote controller, not as an included item.
- Positive themes: Customers report easy installation and value for money.
- Positive themes: Customer feedback praises interlinking and describes the remote control as useful for testing and silencing.
- Negative themes: Some customers report that alarms stop working after a month.
- Mixed feedback: Customer feedback is positive about ease of use and interlinking but raises reliability concerns.

## Frequently asked questions

### How many alarms are included?
The explicit included-components list says 3×Smoke Alarms.
### Do the alarms sound together?
The listing says that when one linked alarm detects smoke, all linked alarms will sound.
### What does the 10-year battery claim mean?
The description claims the supplied batteries can support over 10 years in standby status. It does not establish an unconditional service life.
### Can the alarm be silenced?
The listing says a press of the button silences the alarm for 10 minutes, after which it returns to normal mode.
### Is this a smoke alarm or a heat alarm?
The title and core details identify smoke alarms, but separate listing text calls them heat alarms. Confirm the product type for the selected listing.

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## Add-ons

- [Wireless Interlinked Smoke,Heat and Carbon Monoxide Alarm Kit,Pre-linked,Compliant with Scotland & England Law, Remote Slienc](https://bargainpostbox.co.uk/visit/wisualarm-kit1-3s1c1h-r8-interlinked-alarm-kit)
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## Images

![XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack — 1](https://bargainpostbox.co.uk/i/8EW98AEMXczH2_unWruqdNE9fgb-ThGiU-ZCK1L8W2yXV6xLhBM8lpJFpM2l_OoGFwoRLUooGL9VLYtLQFhl3bmrIPNSfusoegOSF-hcrB8icJ0TEfFqTCwR.jpg)

![XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack — 2](https://bargainpostbox.co.uk/i/mnAmCqtQxuwfnAJyyXzN5sfriV_ajPv7Omq4sdYVxu_DNkBEpqlTTVk6pX3ZHPUNNRQch26ZQLI2Bl92aeUUvK2OKyQRBToOPiYCaJfny863hW4rbYRelL6v.jpg)

![XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack — 3](https://bargainpostbox.co.uk/i/BltOOiT1CIT1QOlyN9swe1jU6-OKl2k5S-e9HSIJ0ygy3CrgrhILLhE95cN3i9pNZLo1K3umGqLIsqxkJl_VuPD8ajQovCRsKZM6qSqIaUGB-TsXU3dydIwi.jpg)

![XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack — 4](https://bargainpostbox.co.uk/i/fabZzKdBolxwJfRexcvqABZKmuPstxVaJTqG33c-jlxE-ylg1oXVczdpEJ0RRg86DLNqG39w5TW40UzVqWui9Eew2Tjr6KjjHwktu9J0NmsdOg2ieDF0iqrX.jpg)

![XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack — 5](https://bargainpostbox.co.uk/i/52-PLeKo-4xXQGHDbMt4HCymU-eIKbF5HEvvRqUvcH2tqGPp_FXCVjYngXcAgRguZ55qrW6ksqlmXWhZKdipDmtYT0pqPzN3mYoQk6pPkM2U4x9z3cKVirna.jpg)

![XINDUM SM11R4 Interlinked Smoke Alarms, 3-Pack — 6](https://bargainpostbox.co.uk/i/Wo-IecWq8NukO8_FSdyuN_ZpsKfFquMS9G-y3dfM6rt0_ap4rO74n3cqYxUAHdRu99kZ5R9ejClP3U93MxD1UzS2vmMmAHL5m65KfgrOMKJ-NNJTYWw5nvJk.jpg)