Garmin 4-Pin Transom Mount Speed Sensor Garmin 4-Pin Transom Mount Speed Sensor Garmin Transom Mount Speed Sensor for all Garmin Echo Series Fishfinders. Comes with 4-Pin Connector and 30' Cable. SKUGAX1027904 MAN#010-10279-04 ID#: 2737 Our Price: $28.95 Availability: In Stock Condition: Brand New Add to cart We’re sorry for the inconvenience, but please know we are working hard to replenish stock and fill backorders. Global shipping constraints and other material shortages have slowed the supply of products in many industries, including GPS and Marine electronics. We update the Estimated Shipping Date on our website in real time, so feel free to check back frequently. Thank You for your patience and for shopping with The GPS Store, Inc.