Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very very difficult to use - do not buy

Volume buttons are very difficult to use. When you press one you end up pressing the other on the opposite side because you have to hold it at that place to press it. The single button that places calls, turns on and off the unit is a pain in the you-know-what. The lid for the battery keeps opening when I try to increase the volume and my call will be dropped from the headset.Overall, very poor design, call volume.