Icom ISL-AK25K 25kHz Channel Spacing License Key Software license to enable 25kHz channel spacing on compatible Icom F-series portable and mobile radios. The Icom ISL-AK25K is a software feature license key that unlocks 25kHz channel spacing capability on compatible Icom F-series radios. This digital license is delivered as a key code and applied to the radio via Icom programming software — no physical hardware is shipped. Once activated, the radio gains the ability to operate on 25kHz-spaced channels in addition to its standard channel spacing, expanding frequency flexibility for organizations operating on legacy or mixed-bandwidth networks. Note: This feature license is not eligible for further discounts. Key Features & Benefits Enables 25kHz Channel Spacing: Unlocks 25kHz bandwidth operation on compatible Icom F-series radios for legacy and mixed-network compatibility. Software License — No Hardware Required: Delivered as a digital license key applied via Icom programming software. Nothing physical is shipped. Expands Frequency Flexibility: Allows the radio to operate on both standard and 25kHz-spaced channels without hardware modification. Genuine Icom OEM License: Factory-authorized feature key ensuring full compatibility and stability with supported radio firmware. Specifications Attribute Details Brand Icom Model / SKU ISL-AK25K License Type Software Feature Key Feature Enabled 25kHz Channel Spacing Delivery Method Digital License Key (no physical shipment) Quantity 1 license (per radio) Compatibility Model Series IC-F5400D, IC-F6400D Icom F5400D/F6400D Digital Mobile Series IC-F52D, IC-F52DUL, IC-F62D, IC-F62DUL Icom F52D/F62D Portable Series Recommended Accessories Compatible Radios Icom F5400D and F6400D Digital Mobile Two-Way Radios — Compatible mobile radios for this license key. Frequently Asked Questions Is this a physical product or a digital license? This is a digital software license key only. Nothing physical is shipped. The key is applied to the radio using Icom’s programming software. Does each radio require its own license? Yes. One ISL-AK25K license is required per radio. Purchase one license for each radio in your fleet that requires 25kHz channel spacing. Is this license eligible for discounts? No. This feature license is not eligible for further discounts. How is the license applied to the radio? The license key is applied via Icom’s Customer Programming Software (CS). Contact Atlantic Radio if you need assistance with license activation or radio programming. Warranty 1-year manufacturer’s warranty.
