These wireless microphones do more than provide unmatched sound quality – they also enable you to capture and replay audio with remarkable clarity. Compatibility with a variety of microphone styles allows you to customize your setup for every lecture or meeting. • Expandable up to 32 (Americas) or 40 (international) microphones per area• Optional management software available for management and control• DECT protocol protects your investment against radio frequency changes• 128-bit encryption ensures privacy of microphone signal• Compatible with a variety of HD Wireless™ Microphones• Features 4 microphone channelsMicrophones sold separately