Buy on Amazon.com : http://www.amazon.com/gp/product/B0016IWGCK?tag=lottalatte-20 <br /> <br />Shure UA820F 1/2 Wave Omnidirectional Antenna for U4D and U4S in the J4 band SLX in the J3 <br /> <br />12 Wave Omnidirectional Receiver Antenna for U4D U4S in the J4 band SLX in the J3 band 572-596 Mhz
