You are purchasing a used complete set of 4 Sennheiser in-ear monitors that will be ready to configure for use right out of the box! Two operate in the A-band, 516-558 MHz and two operate in the G-band, 566-608 MHz. Items ship as pictured; what you see is what you will receive. I used these successfully for several years until October when I upgraded and they are still in great working condition! Set includes: 4x EW300 G3 IEM Transmitter, 5x IEM Receiver (fifth is included as a spare for A-band free of charge), 1x four-way antenna combiner and power distributor, 2x antenna D-fin paddles, 1x power supply for combiner, 4x antenna jumper cables. Message with questions or for more details.