1Wide Frequency Range: This small loop antenna is suitable for a wide frequency range from 50kHz to 500MHz. It is suitable for a variety of radio equipment such as radios, SDRs and transceivers, providing excellent reception in the HF, AM, FM, VHF and UHF bands. 2Active Reception Technology: This small loop antenna is equipped with an active amplifier and top of the line components to ensure optimal signal reception. The loop antenna offers twice the voltage gain compared to conventional loop antennas, while the shielded loop antenna structure effectively reduces interference caused by external factors such as lightning or electrostatic discharge. 3Easy To Install: This loop active receiver antenna consists of a top patch panel, small loop amplifier board, loop coil, feed unit and 12V power supply. Its simple and compact design allows for easy modification and installation. 412V Linear Power Supply: This ring active receive antenna is powered by a 12V linear power supply with a current consumption of less than 150mA, making it energy efficient. 5Sturdy And Durable: This radio active loop antenna is made of excellent ABS and alloy steel material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life.