- Enables switching between high-impedance input and aviation-frequency conversion to achieve reliable impedance matching with a wide range of antennas, including magnetic rods, passive small loop antennas, rod/whip antennas, and other antenna types, improving reception. - Provides high-impedance antenna input matching for malachite or standard 50-ohm input receivers and mobile phones, enabling seamless compatibility across devices. - Down-converts the aviation band from 118 MHz to 138 MHz to the shortwave (SW) band received by ordinary radios, allowing standard radios to easily receive aviation frequencies. - Compact and portable, with a built-in 700mAh battery and USB-C charging, making it a practical companion for travel and listening to the radio. Use scenarios - Travel and field listening: pair with a compact antenna such as a magnetic rod or a passive small loop, connect to a portable shortwave receiver or a smartphone, and listen to the aviation band without specialized equipment. - Home or mobile setup with 50-ohm devices: connect to malachite or standard 50-ohm input receivers and mobile phones to achieve impedance matching and access the aviation band via down-conversion. - Everyday radios and portability: carry the unit for on-the-go aviation-band monitoring on standard radios, thanks to the portable form factor and built-in battery for extended use.