This is a unique, budget wireless DMX system that's super-easy to use. From the Manufacturer: Make any DMX-compatible light wireless! The wonders of wireless DMX control have arrived to previously non-wireless lights with D-Fi XLR. This cutting-edge technology provides instant wireless communication through compact battery-powered wireless D-Fi receiver or transmitter units that plug directly into the XLR port of DMX-compatible lights. Contact pins charge all D-Fi XLRs without the need for any cables. The D-Fi XLR Pack includes 1 transmitter, 3 receivers and 1 multi-charger. The multi-charger simultaneously charges up to 8 D-Fi XLRs (additional units sold separately). D-Fi XLR Pack even has 2 additional USB ports to charge additional devices. Review Video: In the Box: (1) D-Fi XLR TX (3) D-Fi XLR RX (1) Multi Charger (1) External power supply Features: Battery powered wireless D-Fi transmitter provides instant wireless communication Plugs directly into your device’s XLR port Transmits DMX and master/slave signals between similar fixtures LED indicators visually show wireless channel operation Works without the need of an external power supply Fully FCC/RTTE compliant Multi-charger simultaneously charges up to 8 D-Fi XLRs (additional units sold separately) Contact pins charge all D-Fi XLRs without the need for any cables Includes 2 additional USB ports to charge additional devices