This is a well designed German receiver that works in the 137-138 Mhz band for NOAA weather images. It is fully crystalled. When I added NOAA 18 and 19 frequencies I taped the two presently unused frequency crystals to the top. There is no power supply included so 12-15VDC is required. The received image was copied with my homemade omni-directional antenna and processed in WXtoIMG which should still be available free on line. I have some receiver documentation. $100 plus actual shipping cost. ntation for this radio.