Lowrance has three series of fishfinder displays with built-in CHIRP sonar capabilities - the HDS Series III, the Elite CHIRP Series, and the Hook Series.
CHIRP transducers can be plugged directly into the fishfinder display without the need for an external sounder box.
The 3rd generation of the HDS multi-function displays include single-band CHIRP sonar as standard.
The CHIRP versions of the Elite Series feature built-in single-band CHIRP sonar.
The Hook series offer Medium or High single-band CHIRP, DownScan, and conventional 83/200kHz sonar.