Humminbird XPTH-9-HW-MSI-T MEGA SI+/DI+ Dual Spectrum CHIRP Plastic Thru-Hull Transducer w/Temp [710284-1]XPTH 9 HW MSI T MEGA SI+ DI+ Dual Spectrum CHIRP Plastic Thru Hull Transducer with Temp MEGA Side Imaging+ Plastic Thru Hull Transducer supports MEGA Imaging 800kHz 455kHz and Dual Spectrum CHIRP 2D Sonar with a CHIRP range of 150 220kHz. Includes built in temperature sensor, rugged composite design and 30 cable. Features: This accessory is compatible with the following Humminbird products: HELIX 8 CHIRP MEGA SI+ GPS G3N, HELIX 9 CHIRP MEGA SI+ GPS