Vexilar 19-degree Hi-Speed Transducer Summer Kit FL12 and FL20 Flashers 183632. In short this summer kit provides the information you need to have a successful day on the water even in hot and humid areas. Gives you accurate readings all season long in all water conditions and inclement weather thanks to the patent pending technology that extends Vexilar's temperature and water clarity advantages to mid-shelf mounted systems. Gives you total control of your summer fishing fun. Packaged with mounting hardware and detailed installation instructions. Note: For best performance the Vexilar Summer Kit must be installed by a professional technician in a properly sealed and waterproof area - consult with Vexilar before installation. A clean clear space is needed in order for the telegraph to pick up the signal from your sounder and fish finder system. Specifications for Vexilar 19-degree Hi-Speed Transducer Summer Kit: Manufacturer: Vexilar Additional Features: FL12 and FL20 Flashers Package Contents: Vexilar 19-degree Hi-Speed Transducer Summer Kit Vexilar 183632: 19-degree Hi-Speed Transducer Summer Kit FL12 and FL20 Flashers