Exec = Executive Line: Ready to Run, super detailed, numbered, with DCC and Sound or Analog (DC).
DCC and Sound version features ESU LokSound V5 Decoder. Analog (DC) version has 21 pin socket for DCC module.
Bowser does not recommend LOK sound locos for use on DC layouts.

DCC non sound recommended decoder for
Current Production (21 pin socket)
ESU #59629 (8 Functions)

or

TCS #EU-821 8 function decoder

Sound Retro Fit kit C630 loco: #691-1225 $110.00

Click here for instructions

Click here for instructions