Frequency range: 4MHz-24MHz only antenna, For malahiteam receiver Radio not included The antenna is a narrow band resonant antenna that needs to be used in conjunction with the high impedance input port of the malachite receiverotherwise it may cause antenna detuning. Easy installation, stable performance and high reliability. Made of high-quality materials, it is sturdy and durable for a long service life. Type: Loop Antenna Interface: SMA Material: PCB Color: Blue Package Contents: 1 x Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.