hardwater fisherman
Lieutenant Commander
- Joined
- Mar 19, 2010
- Messages
- 1,725
i just bought a lowrance elite-4 and i noticed that it has two ports, but only one cord. the cord i have is for the transducer as well as the power. it goes in the port marked power. the other port is marked temp2. the manual states that it is for an optional speed/temp sensor. it is a paddle wheel type. on the specs page it says transducer with built in temp sensor. and i would assume the speed will be calculated by the gps. so what is the optional speed/temp sensor for, and do i need it?