Depth Transducer, Xsonic, R509LH-W, MFG# 000-13773-001, external mount w/ fairing block, 42-65 kHz/150-250 kHz Dual Channel CHIRP transducer (Wide angle), with XID, analog/digital temp. sensor, and two Black 9 pin connectors. Cable length 10 m (33.0 ft).