This device downconverts the 118138 MHz aviation band to the shortwave (SW) band received by ordinary radios, enabling aviationband reception with standard receivers. Function and benefit Allows aviationband reception with a regular SWcapable radio by converting 118138 MHz to a mode your radio can process. Simplifies listening to aviation transmissions without specialized aviation receivers. Size, power, and portability Compact and portable design for travel and field use. Builtin 700 mAh battery and USBC charging provide convenient, onthego power. Compatibility and antenna flexibility Supports conversion between impedance converter and aviation frequency converter for versatile operation. Delivers good impedance matching and works with magnetic rods, passive small loop antennas, rod/whip antennas, and other antenna types to improve reception. Input matching for diverse devices Provides impedance antenna input matching for malachite or standard 50ohm input receivers and mobile phones, enhancing compatibility with a range of devices. Practical use scenarios Travel listening: pack in a bag to convert aviationband signals for listening on a portable SW radio during trips. Field monitoring: pair with lightweight antennas (eg, magnetic rods or small loops) in remote locations to observe aviation transmissions. Home or mobile use: connect to a 50ohm receiver or a mobile phone for aviationband listening in everyday environments.