This is the Digitrax SDN147PS N Scale Series 7 - 8 Pin DCC Sound Decoder.

• 2 CV-Selectable Steam & Diesel Sound Schemes Included
• Mobile Decoder with SoundFX v3
• Fits many HO locomotives
• Digitrax Easy Connect 8 Pin Harness
• Motor 1.0 Amp/2 Amps Peak
• 4 FX3 Functions, 200ma Output
• New sound .spjs loadable with Digitrax USB programmer
• 8 Ohm 10 mm x 18 mm Oval Speaker
• 100uF Capacitor