U306 HHD Wireless Microphone System with Dynamic Handheld Microphone - 655 - 679 MHz Item No.: LDU306HHD Series: U300 Versions: 655 - 689 MHz Diversity UHF wireless system with FM technology 12 selectable channels 100 m transmission range in ideal conditions Simultaneous operation of up to 6 systems ASC infrared transmitter and receiver syncing Pilot tone squelch 10 h transmitter operation on two AA batteries Metal housing Optional rackmount kit available as accessory U500 replacement mic heads fit the U300 handheld