Camden Door Controls CX-DESPK15 15W speaker station is designed for industrial and commercial applications, where both audio and visual indication is required. The station has an optional Aura feature to visually display three distinct colors for designated states- red, green, and yellow. The 15W speaker can provide audio messages where ambient noise may be present. The faceplate is Stainless Steel with an Aura ring lens. This unit requires 12VDC to operate.