Features: Brand new and high quality Blue sw antenna covers a frequency-range of 4mhz-24mhz, while the red am antenna covers 500khz-2000khz. Perfect for radio enthusiasts and hobbyists who demand high-quality signal reception. Suitable for use in home, office, or on-the-go, especially in areas with weak radio signals or interference. Enjoy clear and stable radio signals anywhere with our donut antenna set. The antenna is a narrow-band resonant antenna that needs to be used in conjunction with the high impedance input port of the malachite receiver,otherwise it may cause antenna detuning. Specifications: Material:Plastic SW antenna frequency range: 4MHz-24MHz AM antenna frequency range: 500kHz-2000kHz Package Includes: 1x Donut AM Antenna 1x Donut SW Antenna note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.