VIDEO DOOR PHONE "CR460C VIDEO DOOR PHONE FOR BUILDINGS B/W video door phone for buildings." BESTWILL-CR460B "CR460c VIDEO DOOR PHONE FOR BUILDINGS B/W video door phone for buildings. Stainless steel outdoor unit. Can connect with 792pcs indoor units. Digital key board. Release the door by ID card(optional). Built-in infrared for night vision. intercommunication electronic-controlled. Password unlocking. SIZE:212*222*54mm 128*390*45mm