Traditional, One-Way, Self-Amplified, Light Brown Woodgrain, Bi-Directional Corridor Speaker for office and retail environments. Projects sound in two directions for excellent coverage in long narrow corridors.- Utilizes Standard Telcom/Datacom Wiring CAT 3/5/6.- Easy Install.- Built-In Amplifier.- Built-In Volume Control on One-Way Speakers.- Corridor Speakers Produce Bi-Directional.- Sound for Long Hallways.- White is Ideal for Medical or Laboratory.- Black is Inconspicuous On Dark Surfaces.