Shure BLX288 PG58 Dual Channel Wireless Handheld Microphone System with PG58 Capsules (H9: 512 to 542 MHz) nd making this bow much easier making this bow much easier to care for Key Features• Heavy duty Z style frame exceptionally stable design supports everything from lightweight portable keyboards to large 88 key digital pianos and workstations• Adjustable height and width easily accommodates a wide variety of keyboard sizes while allowing a comfortable playing position whether seated or standing• Folding design collapses quickly for transport and storage without requiring complete disassembly• All steel construction durable tubing and reinforced joints are built to handle years of rehearsals hosting an event 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