This is a Rectify Series drop-in speaker system for Life-Like Proto 2000 SW9/1200 locomotives. The speaker mounts over the front truck and requires removal of the factory PCB, front weight and a hardwire decoder installation. For Walthers branded Proto SW9/1200s, see item #WLPR-1200-087.
The speaker comes fully assembled and tested.
Dimensions are: 10mmH x 20mmW x 19mmL