That's just the bracket, not the transducer.Here is one on eBay for $58
RAYMARINE RV-100 REALVISION 3D TRANSOM BRACKET KIT 723193817285 | eBay
Find many great new & used options and get the best deals for RAYMARINE RV-100 REALVISION 3D TRANSOM BRACKET KIT at the best online prices at eBay! Free shipping for many products!www.ebay.com