Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 5 feet of coverage! Don't buy!

There is only one application for this product and that is to change your 'mobile' phone into a 'sessile' phone. The booster works up to 5 feet, then your signal goes back to what it is without the booster. The only time this would be of use is if you install the booster at your desk and only need the cell signal boosted at your desk. The ad says 2500 feet of coverage... try 5 feet.