One-Way, 5 W, Bi-Directional, Self- Amplified, Beige Horn provides audio output in two directions and is ideal for long, narrow aisleways. Each set of Bi-directional horns share one five watt amplifier. – Weather-Resistant For Indoor/Outdoor Use. – Use In Long Narrow Aisles. – Utilizes Standard Telcom/Datacom Wiring CAT 3/5/6. – Built-in Amplifier And Volume Control. – Eliminates Mounting Two Horns.