1/4 wave,suitable for Frequency 500-900MHZ UHF wireless microphones; Oxygen-free pure copper core wire material for smooth transmitting without fuss & to 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 '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 's do, compatible series of , SM58S, SM58LC, BETA58, BETA58A, BETA87A,PG58, SLX4, PGXD4, , U4D,U4S,...also fit and operate it for , for , or other ' devices with smaller, unobtrusive antennas. 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: 12 x Microphone Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.