... adjust the accuracy frequency for fix your transmitter 1/4 wave Professional GP Antenna for 5w,7w,15w,30w,50w,100w FM Transmitter BNC or ... only one 1/4 wave GP antenna in the world, which can easily adjust the accuracy frequency for fix your FM transmitter.It is ... one of 1/4 wave GP antenna in the world, which can easily adjust the frequency for fix FM transmitter. Description: 1.Frequency: 89.5MHz ...