Humminbird XP-9-HW series in-hull puck transducers provide clean, no-hole sonar installations for single-layer fiberglass hulls using glue-in epoxy mounting. All models deliver Dual Spectrum CHIRP 2D sonar (150-220kHz, 1200ft max depth) for HELIX series fishfinders. T models include built-in temperature sensors; standard models do not. Bulk-packed OEM versions offer the same performance without retail packaging. 2D sonar only – no Side/Down Imaging support.