Intercom Speaker for VLH-3000A Loud Hailer - BlackRedesigned for clear, crisp, and audible reception, the Standard Horizon MLS-410LH Intercom Speaker acts as a secondary speaker/PA for receiving and transmitting, via the Push To Alert (PTA) button, with the VLH-3000A Loud Hailer. Compatible With:Standard Horizon VLH-3000A Loud HailerFeatures: Flush or bracket mounted Compact size Weather-resistant Technical Specifications: Speaker Cable Length - 6.5&'; (2 M) Dimensions (Diameter) - 5" Maximum Power - 10 Watts Speaker Impedance - 4 Ohm In the Box: Speaker w/speaker wire Mounting bracket Instruction manual *Sold as an Individual Owner&';s Manual (pdf)