This is a TES Command Cube Bundle
It consists of a Train Experimenter Shield and a custom enclosure. One Train Actuator Shield of your preferred type must be selected. You will also need an Arduino Uno. A clone is offered for purchase separately.
This "PDI to PDI" splice pretends to be a very short Lionel PDI cable and allows you to daisy chain two Lionel PDI cables together while respecting the voltages and communications on the devices.
TAS (Train Actuator Shield) Max version
This model of the TAS has a built in "Snubber circuit" to improve the reliability when controlling somewhat inductive loads (like vintage Lionel animated accessories). It handles four command paths - signals on Arduino Uno digital pins 4, 5, 6, and 7 (Match Commands 1, 2, 3, & 4). No assembled version is available. You can get either the raw PCB or the complete kit.
This Shield and Sketch work together to receive power and DCC commands from the model train track and displays the commands on a small, attached OLED display.