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Mains Radio-Interlink Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Kidde Slick SFWRF

Discontinued Product

The Kidde Slick range has been discontinued and is no longer available for purchase. We recommend instead the Aico Ei140 series with the Ei168RC wireless base, though these will require an electrician to replace the wiring.

alternative product

Ei140RF Series - Smoke & Heat Alarms with Radio-interlink

  • 230V mains powered with alkaline back-up battery
  • Available in Optical and Heat versions (Ei146RF, Ei144RF)
  • Interlinks via radio frequency with up to 12 units
  • Kitemarked, CE marked and suitable for BS 5839-6: 2019 Grade D2
  • All alarms also act as repeaters
  • Please note: alarms are sold individually
  • Also suitable for both the Welsh and Scottish 2022 legislation

£86.27 inc VAT

£71.89 ex VAT

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Product Overview

Kidde Slick radio-interlinked (RF) smoke alarms are mains powered from the nearest light fitting and come with alkaline battery backup batteries. The units use radio technology to 'talk' to each other: when one alarm activates, all other units that are interlinked via radio-interlink begin to alarm within seconds. The RF technology negates the need for connection wire, making the installation simpler and cheaper.

  • Complete radio-interlinked smoke alarm including RF (radio-frequency) transmitter
  • Mains Powered with alkaline back-up battery
  • Suitable for installations complying to BS 5839-6: 2019 Grade D2
  • Kitemarked to BS EN 14604 (smoke), BS 5446-2 (heat), and CE marked
  • 6 year warranty
  • Unique identification coding eliminates RF interference with other equipment
  • Up to 15 units can be interlinked
  • Available in 3 versions:
    • KE1SFWRF: Ionisation: for landings
    • KE2SFWRF: Optical: for hallway, living rooms, bedrooms
    • KE3SFWRF: Heat detector: for kitchen and garage
  • Simple 'house coding'
  • Neat Slimline Design
  • Easy connection to wireless remote test and hush switch
  • Very easy installation
  • LED display
  • Test/Hush button
  • Low battery warning chirp
  • Please note: alarms are sold individually
  • This alarm is also suitable for the updated 2022 Scottish legislation for fire alarms in homes

Please Note: These units use the radio-interlink frequency 868.499MHz. This bandwidth is restricted for safety products, therefore the chances of interference should be limited.


The table below shows all the units that can interlink with the KE1SFWRF, KE2SFWRF and KE3SFWRF.

Alarms from the same series
Model Number
Type of unit
Type of interlink
KE1SFWRF Ionisation Alarm with Alkaline Battery Wireless interlink
KE2SFWRF Optical Alarm with Alkaline Battery Wireless interlink
KE3SFWRF Heat Alarm with Alkaline Battery Wireless interlink
Compatible Alarms
Model Number
Type of unit
Type of interlink
KE1SFLLWRF Ionisation Alarm with 10 Year Lithium Cell Wireless interlink
KE2SFLLWRF Optical Alarm with 10 Year Lithium Cell Wireless interlink
KE3SFLLWRF Heat Alarm with 10 Year Lithium Cell Wireless interlink
Ancillary Products
Model Number
Type of unit
Type of interlink
KESRFRTH Remote Control Test and Hush Switch Wireless interlink
Technical Data
Product Code
KE1SFWRF Ionisation Smoke Alarm KE1SFWRF
KE2SFWRF Optical Smoke Alarm KE2SFWRF
Brand Kidde
Back-Up Battery

9V Alkaline

Dimensions (HxDia)

Ionisation Alarm: 60x135mm

Optical Alarm: 60x135mm

Heat Alarm: 89x135mm

Operating Temperature

0 to 40°C

Relative Humidity

Up to 93% Relative Humidity

Sound Output


Weight 0.48kg
Product Datasheets
FAQs (8)
Q. How can we test the alarm to make sure it is working?

The manufacturer's recommendation is to test the alarm by pressing the test button. This will simulate a heat input at the heat sensor. You can also test it with a hair dryer but make sure that the hairdryer is kept away at a suitable distance from the alarm. Do not attempt to test the alarm by using open fire or excessive heat as this may damage the unit.

Q. Do you need an electrician to connect mains powered smoke alarms?

It is necessary that an electrician installs mains powered smoke alarms.

Q. My ceiling light is on a dimmer switch. Can I still power my radio-interlinked mains smoke alarms from this lighting supply?

In modern housing the lighting circuit will travel around your house with the lights being fed from it. Between the circuit and the light will be a switch (or in this case a dimmer) which will control the light. Your mains powered alarms are connected directly to the circuit and have constant power, so are not affected by switches or dimmers. In older homes that have not had the electrics updated this may not be the case so it is advisable to consult an electrician.

Q. Does this alarm conform to BS 5446 part 1 as recommended by the Fire Service?

BS 5446-1:2000 was withdrawn in 2008 and replaced by BS EN 14604:2005 to conform with European standards. All of our alarms containing a smoke detector (smoke only, smoke & heat, smoke & CO) are fully compliant with BS EN 14604:2005. They also comply with any other relevant standards relating to their other detection capabilities.

Q. I installed several KE1SFWRF, KE2SFWRF and KE3SFWRF wireless mains-powered smoke alarms. After installation of the 'master' and the 'slaves' the alarms flash every ten seconds. Is this correct?

Also, when carrying out a test pressing the 'master' test button, the 'slaves' beep for varying periods and sometimes seemingly endless. Pressing the hush button does not silence them quickly.

Flashing lights: The RF bases have visual LED lights on the sides which show the status of the bases. The green LED on the Master RF base will go out for a second once every ten seconds and the Remote RF base green LED goes out for only half a second every ten seconds. This shows normal operation. The smoke or heat alarms themselves have a green LED light which is constantly on when the mains power is connected. They also have a flashing red LED which shows normal operation. This typical flashes once every 30 to 35 seconds showing normal operation or flashes rapidly when in alarm state. Testing and silencing the 'slaves': The hush button on the 'slaves' only reduces sensitivity of the alarms (eg if you have burned some toast and the alarm goes off). It does not switch off the test sequence of the 'slaves' after you pressed the 'master' test button. This test sequence will continue for differing periods, which can be several alarm cycles long.

Q. Can I expand an existing system of Kidde Slick mains powered smoke alarms (with existing interlink through cable) with additional Slick RF smoke alarms as shown in

Yes, you need to add an RF base to just ONE of the existing smoke alarms. Make sure you connect the existing interconnect cable into the slot marked 'i' on the new RF base. Then you can add new RF slick smoke alarms to the system. Just make sure you go through the 'enrolment' process again to ensure all units recognise each other.

Q. What sort of smoke alarm system would I need to install for a HMO?

BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

Q. Please could you tell me how long it takes to charge up the battery on the Kidde radio interlinked bases?

Hello, it takes 24 hours to fully charge the back up battery on the Kidde radio interlinked bases.

Customer Reviews

28 customers have given this product an overall rating of 4.5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: J R

As expected

Published on: 13th June 2021

Rating: 5 / 5 Stars

Reviewed by:

Works fine

Published on: 14th September 2018

Rating: 5 / 5 Stars

Reviewed by:

Works fine

Published on: 14th September 2018

Rating: 4 / 5 Stars

Reviewed by:

Easy to fit

Published on: 27th July 2017

Rating: 4 / 5 Stars

Reviewed by:

Easy to fit, quality items

Published on: 27th July 2017

Rating: 5 / 5 Stars

Reviewed by:

Excellent product but bad terminations I don't like the way it terminates with the mains Incoming feed. I would prefer screw terminals.but the product is 1st class

Published on: 17th February 2017

Rating: 3 / 5 Stars

Reviewed by:

expensive poor instruction. extra backing plates supplied and not needed, so wasted

Published on: 15th January 2016

Rating: 3 / 5 Stars

Reviewed by:


Published on: 15th January 2016

Rating: 5 / 5 Stars

Reviewed by:

Very good works straight away easy to install Would recommend this company

Published on: 18th December 2015

Rating: 5 / 5 Stars

Reviewed by:

Easy to install and operate

Published on: 3rd November 2015

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