AX31144 AE-5 Waterproof Forward/Reverse ESC w/Drag Brake The AE-5 ESC features include 3S LiPo capability, adjustable drag brake and it is waterproof! Settings can be easily switched ?in the field? between LiPo and NiMH battery types with a simple jumper ? no more complex procedures! ? Jumper 1 provides a simple plug and play choice between LiPo or NiMH batteries ? Jumper 2 switches drag brake settings ? Waterproof design