7.0" color video door phone, 7.0" video door phone villa kit 7.0" color video door phone, 7.0" video door phone villa kit, 7.0" video handfree monitorNSK7489CX monitor FunctionCalling,Talk,Monitoring,Remote control the lock. ... certificatesBusiness modeFinal products,SKD/CKD, OEM/ODM available 7.0" color video door phone