Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Mics, some drop out difficulties

When they work without drop outs they are wonderful. Tons of gain and great clarity, tone, etc. The unpredictable drop outs when operating in or around steel beams, bar joists, etc. (which are in most new commercial buildings) make the use of these units quite risky because you never know when you will experience drop outs. Some repositioning of the receiver helps sometimes but the risk of using these vs hard wired mics is always there.