Digital wireless lavalier set. Includes (1) EW-D EM digital 19 1/2" single channel receiver, (1) EW-D SK digital bodypack transmitter, (1) new ME4 lavalier (cardioid, condenser), (1) NT 12-5 CW+ power supply with country adapters, (1) rack mount kit and AA batteries, frequency range: (662 - 694 MHz)