A simple holder to be able to hold a cell phone on the edge of the baby crib ( ikea.com/se/sv/catalog/products/00187875 ) to use the phone as a baby cam with sound ( play.google.com/store/apps/details?id=com.pas.webcam&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5wYXMud2ViY2FtIl0. ) then you can watch over your baby with a computer or Tab ( play.google.com/store/apps/details?id=com.rcreations.WebCamViewerPaid&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5yY3JlYXRpb25 zLldlYkNhbVZpZXdlclBhaWQiXQ.. ). Very simple but effective baby-monitor if you already have a phone. :)