Furuno Transducer Matching Box w/10 Pin Connector [MB1100]MB1100 The MB1100 is a matching box for Furuno LCD sounders. It is used to connect a dual frequency transducer to an appropriate Furuno LCD sounder. The MB1100 comes with a 10 pin connector already supplied, and so does not require the use of a separate pigtail cable assembly. This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Type: Misc Box