Peculiarity This Lucky® wireless sonar fish finder FF916 can be used in ocean, river or lake and is fantastic for detecting types of fish in any fresh water or salt water. This WIFI Fish finder is based on Sonar technology. The WIFI transducer sends a sounds wave signal, the returned "echoes" are transmitted with WIFI technology to the IPHONE, IPAD or other intelligent device, then all the underwater information is displayed on the screen, including the water depth, water temperature, bottom contour, fish location and depth. FISHING SCENES OEM CUSTOMIZATION OEM Available: Device logo, Instruction manual logo and design, Packing box, Lanyard logo and color. MOQ applied.