KMC-3-Does the unit remember the last Bluetooth device it was paired with?

Yes, when you activate the Bluetooth pairing feature on the KMC 3 it will search for the last Bluetooth device it was paired with, automatically connect with it, and play it through the Bluetooth “input”. If that device is not available or does not have Bluetooth enabled, the KMC 3 will automatically switch to the AUX (3.5mm) input as its source.