The most innovative bite indicator ever produced, will take bite indication to a new level. Polyphonic is not only an extremely reliable electronic bite alarms system, utilizing the very best components and electronic technology, it is the first alarm to use polyphonic tones within its circuit boards. The system allows you to choose from one of 10 polyphonic sounds and 6 different standard 'beep' tones. The system is so flexible you can set individual tones for individual alarms and they will replicate exactly through the receiver. Interchangeable colours: Red, Green, Blue & Yellow.