Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Static

The monitor started out okay, but after about a month it began having so much static that it was difficult to hear the baby over the noise. Also, it is so frustrating to have to listen to all of the noise coming from the monitor (despite having very few electrical appliances and no new appliances to cause interference) that we are tempted not to use it at all. After 3-1/2 months of light to moderate use, it is so useless that we are now in the market for a new monitor.