1、118Mhz‑138Mhz Band: This aviation frequency converter can downconvert the 118Mhz‑138Mhz aviation band to the SW shortwave band which can be covered by ordinary radios for reception, thus allowing ordinary radios to realize the aviation band reception easily. 2、Multifunctional: This aircraft frequency converter and amplifier is multifunctional and can realize good matching and working with magnetic rod, passive small loop antennae, tie rod or whip antennae, and other antennas to improve the reception effect. 3、Built In 700mAh Battery: This aviation band converter has a built in 700mAh battery and comes with a USB C port for charging, which can support a long time of use, and can last up to 60 hours for the high impedance amplifier function, and up to 23 hours for the aviation inverter. 4、Compact And Portable: This high impedance amplifier impedance conversion device is small in size and light in weight, which is very convenient to carry and use, and supports the conversion between high resistance converter and aviation inverter. 5、Wide Application: This high impedance amplifier has a wide range of applications, and can be used to match the high resistance antennae input for malachite or standard 50 ohm input receivers and handstands, which is a must have tool for traveling at home and listening to the radio! Item Type: High Impedance Amplifier Impedance Conversion Device Material: Aluminum Alloy Battery: 1 x Polymer Battery, Battery Capacity: 700mAh (Shipped with Built In Battery) AIR to AM+HIZ AMP (1k-150m) 1 x High Impedance Amplifier Impedance Conversion Device 1 x USB Cable