Shropshire Fire and Rescue Service said the alarms are especially important for those living in rented property where standard alarms are unsuitable.

Smoke alarms let off a loud noise but this device flashes and vibrates and can be kept under a pillow or mattress.

The warning comes as part of Deaf Awareness Week.

The Royal National Institute for the Deaf (RNID) said the awareness week is a good time to make sure the deaf are properly protected.