Due to the increased loading requirements on modern boats and large increases in the cost of copper battery cable, the MD battery switches allow you to mount the battery switch very close to the battery, reducing cable lengths to starter motor. They are also ideal for remote isolation of bow thrusters. Tested to UL1107 and CE certified. The optional (sold separately) 722-KS key switch will operate the 701-MD, 720-MD and 722. It is designed to fit into our contour connect panels or can stand alone.