iSpeak 5R 6 W ABS plastic with metal grill cabinet loudspeakers with built-in 100 V transformer and internal volume attenuator. 5" (127 mm) full range speaker. Can be used in emergency 9 wire systems to transmit voice evacuation messages at maximum volume regardless of the volume attenuator setting. Simple installation on any flat surface horizontal or vertical. Rotating logo. Ideal for use for public address and background music applications. Best for retail shops, schools, and government buildings.