Lowrance TotalScan L/H Single Through-Hole Probe Lowrance TotalScan Through-Hole Probe with low and high frequency CHIRP. TotalScan through-hole probe with low and high frequency CHIRP. Single transducer for flat hull mounting or for hulls angled up to 5 degrees with the fairing block. The TotalScan transducer allows anglers to access Mid-Frequency CHIRP, High-Frequency CHIRP, DownScan Imaging, and StructureScan using a single transducer. All-in-one probe with Broadband, CHIRP, StructureScan HD and DownScan Imaging functions Supports Broadband sonar frequencies of 50/200 kHz Supports low and high CHIRP frequencies Supports StructureScan frequencies of 455/800 kHz Supports water temperature Fairing block included in the box