Performs from any posture Stand it up, lay it back, dangle it the wrong way up – you’ll generally get the ideal seem. PositionIQ technologies instantly senses the speaker’s orientation and optimises its audio to provide more oomph to any instant. EN54-23 is a ecu Standard for Visible alarm devices, https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/