Your TL1 can be used as:
1. Function only DCC decoder with transponding
2. Digitrax Transponder
3. Function only DCC decoder without transponding.

Single 125mA (250mA peak) function output for lights or other functions
Function can be turned on/off using F0, F1, F2, F3, or F4
Supports both 2 digit and 4 digit addressing
Programmable from DCC compatible equipment
Configurable Strobe feature lets you simulate flashing lights like FRED, Strobes, Mars Lights, etc.
Compatible with Digitrax DCC Transponding Systems
Approximate size: 0.461” x 0.31” x 0.161” (11.7mm x 7.8mm x 4.1mm)