Each of the Launchkey Mini models has a different functionality. Below is an image of each to help determine which you might have, as well as the start of the serial number for each:
Launchkey Mini MK1 (serial number starts with LH):
This has an orange base.
Launchkey Mini MK2 (serial number starts with A39):
This has a green base.
Launchkey Mini MK3 (serial number starts with A4):
This has a black base, pitch, and mod touch strips and can be used with Components to customise and update the firmware.