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Title: Plantronics gives plenty of feedback
Review: I purchased the plantronics headset with the hope of going hands free for my multi-hour business calls. This product ended up being a hugh disappointment. The main problem with this headset is it frequently goes into a high pitched lock up disrupting my meetings. It is probably due to feedback between the ear and mouth pieces. So to give the product the benefit of the doubt I connected it up to another phone and it did the same thing. Unless you drop the gain down low enough so you can barely hear it will not squeal. Bascially making this product useless. The other issue was when I only wanted to use the handset it created a noticeable hum in the background.
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