This C1720 Dual-Sided Network Display Speaker from Axis Communications is a wall-mounted or optionally ceiling-mounted 3-in-1 public address device. With a speaker and display on both sides of the unit, it provides three ways to communicate with a strobe to grab attention and a powerful speaker that can be heard through a noisy environment, suitable for clear speech and loud alarms. Use this speaker with prerecorded messages, as well as with live audio, and the text display automatically adjusts its brightness to match the ambient light levels, making it easy to read.