Feature:1. Wide Frequency Coverage: Easily receive aviation band signals by converting 118 to 138MHz to the SW shortwave band, expanding the capabilities of your regular radio receiver.2. Seamless Compatibility: Effortlessly switch between high impedance converters and aviation frequency converters for optimal signal reception.3. Enhanced Reception: Perfectly match and work with various antennas such as ferrite rods, passive small loop antennas, antennas, and more to improve reception quality.4. Improved Antenna Matching: Achieve high impedance antenna input matching for devices with peacock stone or standard 50 ohm inputs, enhancing signal reception.5. Portable and Convenient: Compact design with a built in 700mAh battery and USB C charging port makes this frequency converter necessary for home, travel, and radio listening on the go.6. Long Lasting Performance: Enjoy up to 60 hours of battery life for high impedance amplification and 23 hours for aviation frequency conversion, ensuring extended use wherever you go.Specification:Item Type: AIR to AM HIZ AMP Frequency Converter Material: Aluminum AlloyBattery: Polymer Battery x 1Battery Capacity: 700mAh (shipped with built in battery)AIR to AM+HIZ AMP (1k-150m).Package List:1 x AIR to AM HIZ AMP Frequency Converter 1 x USB Cable