This is the "brain" of the Lift Efoil including bluetooth antenna, interface for battery and data cable for connection to battery, and power lines going to motor. Also include the hoses to hook up the cooling lines from the mast section. If you waterlogged your ESC this is the part you will need to replace. It is a plug and play situation, just remove the old ESC and put this one in. Here are some videos to help with the swap:
