Shure BLX288 PG58 Dual Channel Wireless Handheld Microphone System with PG58 Capsules (H9: 512 to 542 MHz) 8 you never know what kind you never know what kind of power you're going to get Pretuned mylar head means you get the pop you're looking for without fear you're going to bust it in the middle of worship or performers• Two PG58 handheld transmitters dynamic microphone capsules tuned for clear vocals with excellent durability for live use• H9 frequency band operation operates in the 512 to 542 MHz wireless range for compatible systems and venues• QuickScan frequency selection automatically finds the best available frequency to simplify setup and reduce interference• Up to 300 foot operating range dependable wireless performance with the freedom to move confidently around the stage or venue The Shure BLX288 PG58 is a dual channel wireless microphone system built for performers who need two dependable handheld mics in one easy to use package