Humminbird XNT-14-74-T TM f/ION & ONIX 200/50kHz [710253-1]Transom Mount Transducer for ONIX 200 50 kHz Mount on the transom (back of the boat). Available on many models, the impact release feature pivots transducer out of the way if struck by an object Specifications: Temperature: Yes Speed Included: No Pins: 14 Mounting Style: Transom Imagining: Standard Box Dimensions: 5"H x 8"W x 10"L WT: 1. 6 lbs UPC: 082324038853 Owner's Manual (pdf)