[1] With it, the 118Mhz-138Mhz aviation band can be down-converted to the SW shortwave band received by ordinary radios, allowing ordinary radios to easily achieve aviation band reception. [2]Support conversion between high-impedance converter and aviation frequency converter It can achieve good matching and work with magnetic rods, passive small loop antennas, rod/whip antennas, and other antennas. Improve reception. It can achieve high-impedance antenna input matching for malachite or standard 50 ohm input receivers and mobile phones. Compact and portable, with built-in 700mAh battery and USB-C port for charging. It is really a must-have tool for traveling and listening to the radio! It can last up to 60 hours when used in high-impedance amplifier functions, and can last up to 23 hours when used in aviation inverters. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Type:110M Colour:Black Material:Metal Package Contents: 1x Aviation Frequency Converter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.