The Humminbird XI-9-1521 brings Dual Spectrum CHIRP technology to hardwater fishing, sweeping a 130–250 kHz frequency range across 15- and 21-degree cone angles for detailed target separation beneath the ice. No temperature sensor is included. Compatible with all HELIX CHIRP units running Ice Fishing mode, with the exceptions noted below.

Specifications:

• Transducer Type: Dual Spectrum CHIRP Ice Transducer
• Frequency Range: 130–250 kHz
• Cone Angles: 15 degree / 21 degree
• Temperature Sensor: None
• Cable Length: 8 feet
• Compatible with: All HELIX CHIRP units utilizing Ice Fishing mode, except HELIX 12 CHIRP SI GPS, HELIX 12 CHIRP DI GPS, and HELIX 12 CHIRP GPS
• Not compatible with non-CHIRP Ice products
• Warranty: 1-Year Limited

Resources:

• Owner's Manual (PDF)
• Installation Guide (PDF)

⚠️ California Prop 65 Warning: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.