Performs from any placement Stand it up, lay it back, cling it the other way up – you’ll constantly get the ideal audio. PositionIQ technologies automatically senses the speaker’s orientation and optimises its audio to provide added oomph to any moment. EN54-23 is a eu Regular for visual alarm units, https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/