Oval 10mm x 18mm 8 Ohm Speaker with wires. Fits many N & HO Scale installations.  
Used on current production SDN144A0, SDN144A1 & SDN144PS sound decoders. 
Digitrax recommends use of a baffle or speaker surround to maximize sound output.
            
            
            
            
            
            
            Specifications
            
              
                
                - Warranty
- 90 Days Materials & Workmanship