Portable Design: Contains 4 Mini Ring ceivers, And Portable, Can Be Placed In Your Pocket, Suitable For Home Or Travel Use. Red Medium Wave Donut (500khz-2000khz), Blue Shortwave (4Mhz-24mhz) Donut, Golden Donut High Frequency Antenna Uv Uhf + Vhf Fm Mini Loop Antenna, 400m-470mhz 80m-150mhz Sma, Suitable For Hfdy Malahiteam Dsp2 Radio Receiver Improvement: Enhance The Sound Quality To Provide You With Good Reception And Improve Your Shortwave Listening Performance. Compact And Easy To Carry, It Uses Variable Capacitance Tuning Function To Improve Signal Reception, And Is Very Suitable For Use With Malachite Receivers Applicable Radio Stations: One Antenna Has Two Functions, Which Can Improve The Reception Effect Of Shortwave Radio Stations And Is Suitable For All Fm Sw Radio Stations. Easy To Assemble: This Loop Antenna Is Easy To Assemble And Requires No Adjustment, Suitable For Broadcasting In Limited Spaces. High-Quality Materials: These Short-Loop ceivers Are Made Of High-Quality Pcb Materials, With Stable Performance And Long Service Life. This Antenna Is A Narrow-Band High-Impedance Resonant Antenna And Needs To Be Used With The High-Impedance Input Port Of The Malachite Receiver. Otherwise, The Antenna Be Detuned And Unable To Work. Donut Blue SW Shortwave Antenna Frequency Range: 4Mhz-24Mhz Donut Red AM (MW) Medium Wave Antenna Frequency Range: 500Khz-2000Khz Donut Gold Frequency Range: 400m-470mhz; 80m-150mhz Sma (The Interface Is Sma Male With Pin) Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use. Colour:As Shown Material:PCB Size: Red Medium Wave Antenna Size:About 100x120mm; Blue Shortwave Antenna Size:About 100x120mm; Gold UV UHF Antenna Size:About 115x100mm; Gold F FM Antenna Size:About 50x60mm Package Contents: 1 * Blue SW Shortwave Antenna 1 * Red AM(MW)