I bought these so we could listen to birds during the winter months. We live on a busy street, so we were picking up street noise as well as noise when there was wind. We solved this by placing it in a ziplock bag. We can still hear the birds, without all the static and noise. And now we have another use! We are fostering a dog and we are using the baby monitor as a dog monitor. I can go get work done outside and keep an ear out for the pup. Thank you for having a baby monitor that doesn't have to be plugged in. This has been PERFECT!