Paddle wheel water speed sensor. Cable Length: 18" from connector to smart module. 10ft from module to end of cable Mounting Location: Transom Hole required to route through a bulkhead: 7/8" (22mm) Package: The EP-25 and a LowranceNet T Multiple EP-25 sensors possible: Yes For use with LowranceNET networks with blue connectors (do not connect to red connectors).