I was given the above Unit & somethings not quite right. Box says it's a U.P. tender? Anyways, coming out by the "Draw Bar" is a Female Plug w/3 wires indicating "Sound"?, but no "Male Plug" is in rear of Locomotive??? I pulled the front of the tender apart & removed the "Board" (2"X1") & Speaker. The boards capacitors are rated @16v.d.c. & the unit has no "On/Off Switch" & only 2 of the 3 wires in Plug are used. I theorize then that it draws D.C. Power from either a Series or Parallel connection with the Locomotives' Motor as the wheels are all Plastic. The "Board" says "Kader 8011" which I find associated with Bachmann so I "Post" for help here. Thank U in advance.   John & Tam

I was given the above Unit & somethings not quite right. Box says it's a U.P. tender? Anyways, coming out by the "Draw Bar" is a Female Plug w/3 wires indicating "Sound"?, but no "Male Plug" is in rear of Locomotive??? I pulled the front of the tender apart & removed the "Board" (2"X1") & Speaker. The boards capacitors are rated @16v.d.c. & the unit has no "On/Off Switch" & only 2 of the 3 wires in Plug are used. I theorize then that it draws D.C. Power from either a Series or Parallel connection with the Locomotives' Motor as the wheels are all Plastic. The "Board" says "Kader 8011" which I find associated with Bachmann so I "Post" for help here. Thank U in advance.   John & Tam