The TR12 is a smart trigger module that offers four channels and can be programmed individually to provide positive or negative outputs. Conveniently, each channel's type of output can be defined as pulsed, latched, timed, ground, and positive 12 Volt with up to three amps of current. The unit is programmable using a PC to control the outputs with accuracy. 8 Input Channels 4 positive and 4 selectable positive/negative 4 Programmable Output Channels Pulsed Latched / Unlatched Delay (Timed) Toggle Actuator Ground 12V output (up to 3 Amp each) Customized PC programming capabilities: Low Voltage Trigger with Adjustable Trigger Voltage Turn-on / Turn-off delay Latching / Pulsed Outputs Door Lock Pulse Generator Channel Expander 1 or 2 Linear Actuators Pre-configured presets for most popular uses Alpine, Clarion, and Pioneer radios Ability to save and load user-defined configurations LED confirmation indicators