Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Does not Work - 3 separate units

I decided on this outdoor speaker based on recommendations listed on Amazon. I am HIGHLY disappointed. The first unit simply did not work. After much hassle, I received a replacement unit (which I paid shipping to return the original). The second unit worked until we turned it off, then it would not come back on again. We received a third unit from the manufacturer and all seemed to be working fine - for about 2 days. Now it won't work again! I'm extremely disappointed in this product. Three months and 3 units later, we still do not have a functioning outdoor speaker!