... ,OEM video doorbell,color video door phone,video intercom system,3.5" indoor unit,2.4GHz hopping frequency,120-200M remote range,OEM Specifications ... photo record function when nobody answers the call;Built-in 16 doorbell chimes for option;Intercom Function,clear talk quality;Calling ... in any country.OEM & ODM are both highly welcomed. Wireless Digital Video Doorbell Villa Color Video Intercom System