Digitrax SDH164K1B HO Sound Decoder, Kato SD38 2 6 Function 1A Code Type_Code 125 that can support the weight that can support the weight of the sometimes heavy engines used in the larger scales Plug n Play Accessory • Connects easily to FasTrack with a Plug n Play Lock on (sold separately) • Connects to a traditional O O27 track lock on or to an accessory power supply (lock on and power supply sold separately) • Can be upgraded to command control with the purchase of a SC 2 Switch Controller or an ASC2 (both sold separately) Its key features are: 8 light LED illumination Tilting head Screw mount holes on base to secure accessory to layout (optional) Dimensions: 15” height Original Box: Yes (P 9) Class B RFI compliant