Feel confident that you are safe out on the open water when you bring along the FELL Marine MOB+ Base Pack Multifob. The man-overboard kill switch technology electronically shuts off your boat's engine within 1 second after falling off while the wireless xFOBs and xBANDs help offer you free range of motion. The xHUB system can store up to 20 xFOBs to help secure those traveling with you.