those are junk..My wife hates external antennas so I use this. Sort of like a thru glass antenna but nothing outside. It shows 145-165 but I was able to
tune it down, has a tuning pot with set screw, to Ham Band. They also make one for 450-470 which tunes down to UHF Ham Band as well.
Works good enough so my wife can take advantage of talking. If you're in a radio rich environment, you really don't notice any loss.