I researched hours and hours trying to find a good baby monitor that would not have a static sound in the background, and this one worked just fine. It was annoying though if I didn't have it charged up all the way, because the light would flash. I also didn't like that if one part of the monitor was turned off, the other part of the monitor would make a high pitched beep until you had both parts on at the same time. Overall it was basic enough, but ended up not using it as much as I intended. Sound/Video Clarity The sound was very clear. I was able to hear my baby breathing, sighing and coughing. It was a little too clear at times, so I was grateful you can turn the volume down and off. I really liked the feature that when you do turn the monitor's volume off, you can still track the baby's sound by watching the light rings on the monitor. Interference I never had any problems with any interference or static on this monitor. We have cordless phones, and neighbors with babies as well (just over 6 feet away) and this monitor never picked up any other signals. The high definition digital monitor prevents that from happening. Durability I've had it for a few years and it seems to be working just fine. You just have to make sure its charged correctly before being able to use it. Portability The monitor does have a little clip to put in your pocket, but I don't think I ever did. Its about the size of a large tv remote control, so I just carried it around the house with me.