DYNAMIC MICROPHONE Wireless set consisting of a beltpack, HM3 headset microphone (omnidirectional). ClearScan function to automatically find free channels. One-step setup EZsync mode. PL22 cardioid dynamic microphone. 14 hours of operation using two AA batteries. Robustly built metal handheld transmitter. Metal rack receiver with optional rack mount accessory (RM-300 accessory for one receiver or RMD-300 for two receivers). Working frequency range: 618 – 634 MHz (band A).