John Lewis SA700JL Optical Smoke Alarm


John Lewis
Eligible for International Delivery
Power supply
Includes 3x AAA batteries

Product information

The John Lewis SA700JL smoke alarm features optical technology to reduce false alarms caused by cooking smoke and shower steam. It uses a loud 85dB alarm and there’s a Test and Silent button and a low battery warning.

Where to place your alarm: One on every level of the home and one in each sleeping area.

Note: This product is intended for domestic use. All John Lewis Alarms conform to regulatory requirements including EN14604.


Click & collect

Free Click & collect from John Lewis or Waitrose shops for collection tomorrow from 2pm
347 participating John Lewis and Waitrose shops

Standard delivery


Next or named day delivery


Next or named morning delivery


Collect+ from a local shop from tomorrow - postcode exclusions apply for Collect+ deliveries

5000+ participating Collect+ shops

International delivery not available


We want you to be happy with your purchase. If you're not, just return the products to us or to one of our shops. Unless faulty, we'd like this to be within 90 days of purchase. Exceptions apply to certain products - find out more about our refund policy.

Depending on the type of product, you can make free returns via our shops, Royal Mail (or courier collection for large or heavy items), Collect+ or via MyHermes.

Find out more about returning products

Q & As

John Lewis SA700JL Optical Smoke Alarm 3 5 4 4
does what it's supposed to had this for over a year, no fault, easy to install, about to move house so buying more for extra rooms. 19 October 2013
Faulty after a few months After a few month it started going off for no reason. We changed the batteries and it stopped working all together. John Lewis customer service was fantastic and refunded us immediately. 25 June 2012
Faulty batch? On pressing the 'test' button the alarm didn't make any sound at all, so I exchanged it for another in the shop. The second one had exactly the same fault - when I returned this one, the shop staff also tried to operate it , to no avail. They also gathered yet another one from the storeroom and this too made no sound. At this point I gave up and went elsewhere. 21 June 2012
Working well! Item was to replace an old one (of another brand) which had given up the ghost. The new one seems to be working well. Thank you. 23 November 2011
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Additional services

  • 5 year guarantee included

More than 10 in stock