Panel intercom commax external aluminum casing 4 flat unit phone gate with 4 headphone in all possibilities with the possibility of talking to the visitors of the door issue Brand: Commax Type: Intercom Are batteries needed to power the product or is this product a battery: 0 Is this a Dangerous Good or a Hazardous Material, Substance or Waste that is regulated for transportation, storage, and/or disposal: 0.