VocoPro AIR-NET Professional Wireless Audio Transmitter System Transmit Audio Wirelessly to Remote Powered Speakers. (speakers not included). Approximately 150 ft. Range (Line of Sight). 20 Channels Receivers Automatically update to Transmitters Channel. One Rack-Unit for Convenient Integration with Your System. RCA, 1/4" and XLR Connectors Included for Speaker Compatibility Digital Audio with 48K Sampling Rate and 16-Bit Resolution. Input Your Source to the Transmitter with RCA or XLR. Body-Pack Type Receivers Can Use AC Power or Battery