This is Digitrax TF4 DCC Quad Function Decoder w/ Transponder. Its key features are:Four 125mA (250mA peak) function output for lights or other functionsFunctions can be turned on/off using F0-F12Supports both 2 digit and 4 digit addressingProgrammable from DCC compatible equipmentConfigurable Strobe feature lets you simulate flashing lights like FRED, Strobes, Mars Lights, etc. on the yellow and white leadsStandard On/Off Function operation available on green & violet leads.Compatible with Digitrax DCC Transponding SystemsApproximate size: 0.461” x 0.31” x 0.161” (11.7mm x 7.8mm x 4.1mm)Condition: Factory New (C-9)Operational Status: FunctionalOriginal Box: Yes (P-9)Manufacturer: DigitraxModel Number: TF4Road Name: **** No Road NameMSRP: $23.00Scale/Era: HO ScaleModel Type: Control & ElectricalThe Trainz SKU for this item is P11476204. Trainz Product Id: 11476204