Portable fish finder for lakes, rivers, small area of saltwater. Can be casted and retrieved via fishing rod & reel. Can scan while trolling via attachment (not included) on slow moving boat, kayak. Download & install mobile app (Apple app. store or Google app. store, configure scanning mode and other basic information. Start scanning, locate and catch fish! Located many lake trout and river steelhead! Only a year old or so old. No damage whatsoever. Normal wear & tear. Used but never abused. Items pictured is complete package. More product details: https://deepersonar.com/us/en_us/products/deeper-smart-sonar-pro-plus