Enables downconversion of the 118MHz to 138MHz aviation band to a frequency range receivable by standard shortwave radios, allowing ordinary radios to receive aviation band signals. Features a high-impedance amplifier for improved matching and performance with magnetic rod antennas, passive small loop antennas, rod/whip antennas, and other antenna types. Enhances reception performance and supports high-impedance antenna input matching for first-generation malachite receivers or standard 50-ohm input receivers and handheld devices. Compact and portable design with built-in 700mAh battery and USB-C charging port. Provides wide frequency coverage with conversion from 118MHz–138MHz to 8MHz–28MHz, compatible with most shortwave radios. Delivers approximately 10dB of signal gain. HiZ amplification frequency range: 1kHz–150MHz. Battery capacity: 700mAh. Charging time: approximately 2 hours. Color: Black. Material: Aluminum alloy. Package includes: 1 x frequency converter (appearance may vary slightly due to different product batches, but does not affect functionality). Other items not included. Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement tolerance: +/- 1–3 cm.