The Prop Shield LC is the stripped-down version of the Teensy Prop Sensor Shield (motion sensors removed)
The Teensy is known as a great value, as it's Arduino-compatible, super-powerful, and has a well-established userbase. The Prop Shield LC is designed to mate with a Teensy to open it up for use for quicky-builds of props and costumes. It differs from the regular Prop Shield in that it removes the more costly motion sensor ICs for budget applications.
What the Prop Shield LC brings to the party is this:
The Shield can be directly soldered to a Teensy, but it is slightly longer. A slight increase in size and thickness results in a HUGE increase in functionality of your Teensy installation!
On a side note, although this is designed for a Teensy, it could be "hotwired" into any 3.3V compatible microcontroller to make use of most (if not all) of these features. It's a real bargain of a board, not be overlooked for adding functionality to your project.