Multimedia stereo amplifier has 50 watts of power and built-in UHF user selectable 16 Channel receiver (584 MHz-608 MHZ). 3 mic inputs (dynamic, condensor, wireless), auxiliary line in with separate volume and tone controls, line out to record, extra speaker jacks. Power with 10 'D' batteries for up to 200 hours (not included), S1460 AC Adapter/recharger, or S1465 Rechargeable Nicad Battery Pack (requires S1460).