1/4 wave,suitable for Frequency 500-900MHZ UHF wireless microphones; Oxygen-free pure copper core wire material for smooth transmitting without fuss & buzz to guarantee the top quality performance for your devices; BNC aerial wire connector, easy to assemble to your wireless microphones receiver with the replacement manually locked on; These replacement BNC Antennas are designed to fit Shure's, but also working on the wireless microphone with frequency 500-900 MHz, if your wireless receivers fit to BNC lock of the antennas properly. Therefore, these are not only do what the for Shure's do, compatible series of SM58, SM58S, SM58LC, BETA58, BETA58A, BETA87A,PG58, SLX2 SLX4, PGXD4, UC, U4D,U4S,UB...also fit and operate it for Sennheiser, for Telex, or other brands' devices with smaller, unobtrusive antennas. Brand and High Quality Steady, constant frequency. Applicable frequency band: UHF (U segment) The interface type: BNC (bayonet) Colour:black+silver Material:plastic+metal Package Contents: 4 x Microphone Antenna