Review on Boost Your Communication: Plantronics S11 Telephone Headset System - Enhanced Audio, Black by John Hall

I expected a $50 headset to be high quality. I was wrong. The first S11 headset I received was not fully assembled. The earpiece was attached to the headset by two tiny speaker wires. The headset didn't work at all. Thinking maybe I got a rare lemon I asked for a replacement. The replacement arrived and parts rattled in the earpiece. After connecting, the sound and voice quality was terrible. I followed the instructions to set up the device, but no combination of settings solved the audio and voice quality issues. I returned this headset for a refund. My experience with two S11 headsets was disappointing. If two of the two sets are defective, this indicates a general lack of brand quality. I recommend you avoid the S11 headset and find something else.