The SRC-C1 Dual-Channel Receiver from Lectrosonics consist of two separate receivers built into a single, ultra-compact housing. The receivers are powered from an external 7-18V DC source (V-lock battery or other power source). D-tap power cables, power supply & Mini XLR – XLR3F & XLR3M cables included. More info: http://www.lectrosonics.com/US/Receivers/product/527-src-src5p.html