[1] With it, it is possible to downconvert the 118MHz to 138MHz aviation band to a regular radio, which can cover the received SW shortwave band. So that ordinary radios can easily achieve aviation band reception. [2] High resistance amplifier It can achieve good matching and operation with magnetic rods, passive small loop antennas, rod/whip antennas, and other antennas. Improve reception performance. Can achieve high impedance antenna input matching for first generation malachite or standard 50 ohm input receivers and handheld devices.<br><br>Compact and portable, with a built-in 700mAh battery and a USB-C port for charging. Wide coverage, can achieve frequency conversion from 118M-138M to 8M-28MHz, and the vast majority of shortwave radios can cover frequency gain: Approximately 10dB. HiZ amplification frequency: 1khz-150MHz Battery capacity : 700mAh charging time : about 2 hours Colour: Black Material: Aluminum Alloy<br><br>Package Contents: 1* frequency converter (Due to different product batches, the appearance , which does not affect the use)<br><br>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.