Garmin GT23M-TM 010-12404-00 Transducer CHIRP Traditional 600 W; ClearVu 500 W Frequency: CHIRP Mid-band (80-160 kHz); ClearVu CHIRP 260 kHz (245-275 kHz) & 455 kHz (445-465 kHz) Beam width: Traditional (24-13); ClearVu (2.0x51 at 260 kHz) & (1.4x29 at 455 kHz)