Transmitter base has a stereo 3.5mm jack for audio input.  The transmitter also has a DC power input jack; however, the transmitter can be used without the DC power input as it has a battery compartment for two AA rechargeable batteries (not included).  The headset has a rechargeable AAA battery (included) under each ear cushion.  All batteries will charge whenever the DC jacks are energized.  This bundle includes all original components:  international AC plug adapters; CD user manual; DC power splitter cable to charge both headset and transmitter simultaneously; the DC power supply.