3.5Inch LCD DSP2 SDR Malachite Radio Receiver 10kHz-380MHz 404MHz-2GHz Speaker

  

Antenna: 50 Ohm female female pin SMA connector High impedance mode (DSP2 or DSP1 with optional board) Bias tee active antenna (DSP2 or DSP1 with optional board). These features work together to eliminate unwanted background noise and improve audio quality.