... doorbell,color video door phone,video intercom system,3.5" indoor unit,2.4GHz ... OEM video doorbell,color video door phone,video intercom system,3.5" indoor unit,2.4GHz hopping ... ;Built-in 16 doorbell chimes for option;Intercom Function,clear talk quality;Calling out,Surveillance, ... s part in any country.OEM & ODM are both highly welcomed. Wireless Digital Video Doorbell Villa Color Video Intercom System ...