Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can't use, can't review

Just received my orders - 1)Microsoft LifeChat LX-3000 Headset, and 2)Panasonic KX-TCA86 Comfort-fit headset with travel fold design. I am not alone in the house, and we have 2 computers - one upstairs, the other downstairs. I used the MS LifeChat w/o a problem because it has a USB connection. But the Panasonic KX-TCA86 I could not try because its 2.5mm connection is too small incompatible w/ the computers' or monitor's plug in connectors.However, the Panasonic has a more comfortable & lightweight fit than the MS LifeChat. I can leave it on my head much longer than the LifeChat.