Features:
This product includes four independent bandpass filters, which are divided into four frequency bands.
P1 filter is 0.5-1.5MHz, suitable for MediumWave radio listening use.
The P2 filter is 4.5-12MHz, suitable for use in the ShortWave low frequency band and the 40 meter amateur frequency band.
The P3 filter is 12-30MHz, suitable for use in the shortwave high-frequency band, as well as in the amateur frequency bands of 20 meters, 15 meters, and 10 meters.
The P4 filter is for FM broadcasting frequency, 88-108MHz.