This is a Reedy SC480X program card from Team Associated. The pre-programmed default ESC settings work very well in most situations, but if you want access to additional settings for fine-tuning, you can do so using optional Program Card (#27034).

The following settings can be changed using the Program Card:

Initial Drive: Throttle applied the moment the trigger is moved from the neutral position to the throttle range.
Low-Voltage Cutoff: The cell voltage at which the ESC will shut off to protect the battery.
Drag Brake: The brake force applied when the throttle trigger is returned to the neutral position.
Max Reverse Power: The maximum reverse speed allowed relative to the forward speed.
Punch Control: The aggressiveness of the application of throttle.

Specs:

HEADER: Setting / Value
Initial Drive: 2%, 5%*, 10%, 15%
Low Voltage Cutoff (V/cell): 3.2, 3.3, 3.4*
Drag Brake: 0%, 50%, 75%, 100%*
Max Reverse Power: 50%, 75%*, 100%
Punch Control: Soft*, Medium, Strong
HEADER: *Default setting

This part fits the following other parts:

ASC27011 - Reedy SC480X Brushed Crawler ESC