Using an extension cord with a baby monitor is not recommended. While it may seem like a harmless way to get around not having a outlet near the crib, there are potential dangers. The biggest danger is that the cord could become wrapped around the baby's neck, leading to strangulation. Even if the cord is not wrapped around the neck, it could still pose a tripping hazard. If you must use an extension cord with your baby monitor, make sure to keep it away from the crib and out of reach of your child.