The M1W is an antenna designed for receiving AM & Shortwave frequencies only i.e.: 525kHz to 21MHz, It can be cut down to what ever length that is required but it is important to note that the longer the antenna the better its performance. The M1W is a 7mm thick fiberglass antenna that has a tight loading coil from the top to bottom which creates a sensitive antenna for very low frequencies. The M1W is a 7mm thick fiberglass antenna that is also available in White, RED, GREEN, BLUE or YELLOW The M1W will work on FM, but not as well, as a combined AM / FM antenna 

• Combined with the APN16 , this is the best performing AM antenna on the market.

NOTE:

• The M1W can be cut to any length without too much reduction in performance
• This antenna is designed to work only with a low capacitance cable RG62 or equivalent, not CB radio coax cable