The Humminbird Matrix SmartCast Wireless Sonar Link as RSS Fishfinder is a portable and handheld system designed specifically for fishing activities. This innovative product from Humminbird allows anglers to wirelessly connect their fishfinder to their smartphone, providing real-time sonar readings and GPS location information. With its easy-to-use interface and advanced features, the Matrix SmartCast Wireless Sonar Link is a must-have tool for serious fishers looking to enhance their fishing experience.