Take a peek through the ice with Humminbirds XI 9 19 Ice Transducer. Single/dual beam at 9 or 19 lets you do a concentrated or broad scan. 455kHz/240kHz operating frequencies. 8 ft. of cable gets through the thickest ice. Compatible with Humminbirds ICE series 35, 45 and 55 models. Type: Transducer.