Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buzzes like a bumblebee

I bought mine at Radio Shack ... (very high price even for a good product of this type). I have never had good results with it. It buzzes very loudly on the person's phone I am calling, but not in my ear. I tried to call the same people without using the headset and the buzzing disappeared completely. At first I just thought it was a bad fit for my phone, but now I realize it may be a defective model. Needless to say, Radio Shack was not empathetic and did not let me have either a refund or an exchange.CAVEAT EMPTOR! (Buyer beware!)