Nady WA 120 Portable PA System with Wireless Omni-Lavalier Mic Channel A WA 120:Noise reduction Companding circuitryPowerful 20W audio outputBuilt-in echo/reverb, 1/4" unbalanced input jacksRecord outTreble and bass controls External AC adapter or internal battery power(8 alkaline or rechargeable D batteries)Convenient charging ports for 9V rechargeable transmitter batteries (NiCad or Ni-MH)Small and lightweightWLT Bodypack Transmitter:Lavalier microphoneOFF/STANDBY/ON switchLow battery LEDLocking 3.5mm mini-jack provides secure mic cable connectionEasily accessible