High Impedance Amplifier Donut Antenna Built-In 800mah Battery Circular Antenna 1Hz-300MHz for HackRF One for SDR Walkie Talkie _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ High Impedance Amplifier Donut SW AM Antenna 1Hz-300MHz Doughnut Short Wave Antenna 5V 600mA for HackRF One Built-In 600mah Battery for SDR Walkie Talkie _x000D_ Feature: _x000D_ 1. Impedance Conversion and Matching: The high impedance amplifier serves as an impedance conversion device, allowing you to convert higher impedances into standard 50 ohms, thereby achieving impedance matching and isolation. _x000D_ 2. Enhanced Reception Performance: With its higher input impedance, the amplifier maximizes energy acquisition from the input antenna, reducing signal energy loss caused by unstable input antenna impedance. This significantly improves reception performance. _x000D_ 3. Direct Connection to Resonant Antennas: Thanks to its compatibility with LC resonant circuits, this amplifier can be directly connected to resonant antennas, allowing direct energy extraction from these antennas. This results in higher gain and selective frequency characteristics. _x000D_ 4. Reliable and Stable Performance: Crafted with a focus on quaquality, this high impedance amplifier ensures reliable and stable performance, meeting the demands of professional users. _x000D_ 5. Easy Installation and Use: This high impedance amplifier is designed for easy installation and use. With clear instructions and a user-friendly interface, it is suitable for both beginners and experienced users. _x000D_ Specification: _x000D_ Origin: Mainland China _x000D_ Certification: CE _x000D_ Input impedance: 1M _x000D_ Output impedance: 50 _x000D_ Gain: 0dB _x000D_ Bandwidth: 300MHz _x000D_ Charging voltage: 5V _x000D_ Built-in battery capacity: 600mAH _x000D_ _x000D_ Charging current: 600mA_x000D_ _x000D_ Working hours:24H _x000D_ Material: ABS+PC _x000D_ Product size: about 49.00x45.00x19.00mm (1.93x1.77x0.75inch) _x000D_ _x000D_ _x000D_ Note: _x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x000D_ Please allow 1-2cm measuring deviation due to manual measurement._x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 1 XHigh Impedance Amplifier _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_