Digital Dual Channel Wireless System handheld and bodypack microphone system AI and AH frequency bands Digital Dual Channel Wireless System, Two discrete channels of wireless packaged in one receiver chassis. Digital High Definition Audio. High Contrast LCD Display. Operates in 900 Mhz band free from TV and FCC regulatory issues. Advanced dipole antenna technology for increased operating distance. Multiple output options on the receiver for maximum flexibility. Professional balanced XLRM-type discrete output. inch unbalanced output for easy connection to inch input. Handheld transmitters feature the CADLive D38 capsule. Bodypack systems include Condenser Headworn Microphone and Guitar Cable. All transmitters outfitted with on/off, Mute function for easy use. All transmitters feature low battery indicators. AA Battery Life of 10Hrs of operation. Available in 2 separate sets of frequency bands, AH and AI bands.