(51 customer reviews)

  • MEET THE LATEST 2018 REGULATION – Our products are updated closely according to The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, label with the document code “EN 50291:2018” released by Technical Committee. It is important for you to make sure your CO alarm is labeled with the latest code, not only for your own properties but also the commercial and residential tenancy.
  • SEALDED IN 10-YEAR LITHIUM BATTERY – A lithium battery comes with the CO alarm that operates worry-free for 10 years. No more low battery chirps go off in the midnight. No battery replacement is required but simply replace the whole CO alarm at the end of 10 years when low battery chirp is off. Our product has 10-year life-time warranty for your peace of mind.
  • SMALL & PORTABLE – The CO alarm is 7 X 7 cm, even smaller than a human hand. The neat and stylish look blends naturally into any room of your home. As there is a built-in battery, no hard wire work is requirement. Simply hang it on anywhere you need, such as home, offices, RVs and camp sites. Our CO alarm will be a trusted device to guard your health and safety.
  • DIGITAL DISPLAY & INDICATOR LIGHT – The digital display screen shows the real-time CO level in the environment. The three indicator lights show you the current status of the CO alarm: the green light flashing slowly means the CO alarm works properly; the yellow light means an error/fault; the red light warns you the CO level is above the normal level. The warning chirp is as loud as 85dB.
  • INDOOR & OUTDOOR USE – Our portable lithium battery CO alarm is suitable for indoor and outdoor use. It is accurate and durable. It is small and light to be carried around. You can use it at home, in your office, in your tent and RV, and wherever the CO level might be a concern.

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  • Brand: WOLF SHIELD
  • Model: ‎BJ-828B
  • Color: Black / White
  • Material: ABS
  • Voltage: ‎3 Volts
  • Power Source: ‎Battery Powered
  • Battery Cell Type : ‎Lithium Polymer
  • Installation method: Wall-Mounted


  • Product Weight: ‎76 g
  • Package Weight: 5.0kg 
  • Product Size: 7 x 7 x 2 cm; 76 Grams

Package includes

  • 1x Manual
  • 2x Screws
  • 1 x Mounting bracket
  • 2 x Anchor plugs
  • 1 x CO alarm



Questions & Answers

Does this meet the Scottish 2022 updated legislation?

The law in Scotland has changed and as of 1 February 2022 every home now needs to have interlinked fire alarms. So you should check your alarm if they complies with the standards - Carbon monoxide detectors: British Kitemark EN 50291-1

There are 2 types of interlinked fire alarms that meet the new rules:

sealed battery alarms – which should be tamper-proof long-life (which can be up to 10 years) batteries. You can fit these alarms yourself.

mains-wired alarms - these are cheaper than tamper proof long-life battery alarms, but should be installed by a qualified electrician. These should be replaced every 10 years.

Both types of alarm are interlinked by radio frequency without the need for WiFi.

If the carbon monoxide alarm is battery operated, it must have a sealed battery for the duration of its lifespan, which may be up to 10 years. 

Is co alarm mandatory in uk?

Carbon monoxide alarms will be mandatory in UK

According to The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, landlords in England are required by law to “provide a carbon monoxide detector (CO alarms) in any room used as living accommodation where solid fuel is used .that means housing providers are required by law to install smoke alarms in all social housing, and carbon monoxide alarms must be fitted in social and private rented properties with fixed appliances such as gas boilers or fires.

How long does the co alarm good for?

10 years after the product leaves the manufactory, You can check the date of production on the product

Can the batteries be replaced, or is it a new unit in 10 years time?

 Built-in 10 years Sealed lithium battery, The whole unit will need to be replaced in 10   years. 

Where are co alarms required

 The regulations require a carbon monoxide alarm must be installed in

How to install the product

WOLF SHIELD pack comes with two wall screws and screw plugs,the unit an be mounted on the wall, After installing the bottom plate, you can use it directly when you put the product on it.

Can paint trigger co alarm

According to the manual, This alarm has been rigorously tested for immunity to a variety of gasses and vapors, which could affect the operation of the CO-Alarm. However caution should be taken, when handling or decanting oils, cleaning fluids, polishes, paints and greases. The vaporized products of cooking operations may also cause nuisance alarms over time.

The substances listed below may cause alarms other than carbon monoxide alarms at high concentrations; Methane, propane, isobutane, ethylene, ethanol, alcohol, isopropanol, benzene, toluene, acetaldehyde, acetate, hydrogen, hydrogen sulfide, sulfur dioxide

How to test co alarm,How often do i test it

Test button,Normally, You can run a test as often as you like (mid week / once a week)

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