Lowrance 000-12568-001 TotalScan Skimmer Transducer Features Medium/High Chirp Frequencies Lowrance 000-12568-001 TotalScan Skimmer Transducer Features Medium/High Chirp Frequencies Skimmer transom mount, CHIRP Mid/High, 455/800 KHz Combines CHIRP, Down Scan and Structures can HD into one transducer