Wireless Handheld Microphone SystemECM wireless microphone systems provide the reliability and high-performance offered by the UHF frequency band. High quality construction ensures durability, and multiple configurations provide solutions for your specific need. Features16 user selectable channelsIR syncDiversity antennasXLR balanced and ¼" unbalanced outputOutput volume level controlSquelch adjustmentFrequency range: 655~679MHzApproximate 200Â" rangeReceiver requires 12V, 400mA power (adapter included), transmitters require 2 Â"AA" batteries (not included)Available configurations:Guitar with body pack transmitterHeadsetLavaliereGuitar budDyanamic handheld