Standalone smoke alarms
Battery-powered smoke alarms that work on their own, with no wiring and no app. Most models in this range run on a 10-year sealed battery, so there is no battery to change.

2 smoke alarms
X-Sense SD11
The SD11 is a straightforward smoke alarm that you fit once and then forget about for years. Its photoelectric sensor and built-in 10-year lithium battery keep watch around the clock.
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3 smoke alarms
X-Sense XS01
Measuring just 78 × 48 mm, the XS01 is one of the most discreet smoke alarms around. It runs for 10 years on its built-in battery and fits in minutes.
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2 smoke alarms
X-Sense XS0G-SN
The XS0G-SN is only 25 mm thick and can be fixed with magnetic pads, so there is no need to drill. It stays dark on standby and only lights up when it has something to tell you.
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