Shure BLX Wireless System User Manual | Page 63 / 64 | Also for: BLX2/PG58 Handheld Wireless Microphone Transmitter with PG58 Capsule (H10: 542 to 572 MHz), BLX2/SM58 Handheld Wireless Microphone Transmitter with SM58 Capsule (H9: 512 to 542 MHz)