Instruct: Classify Amazon reviews into positive or negative sentiment
Query: SONY MDR-IF240RK WIRELESS HEADPHONE REVIEW

The set was easy to put together and the sound quality is good. The range of transmission is one room only. Which is fine for me. If anything gets in the way or if you turn your head around the sound is lost. This is not really problematic. What is slighly annoying is the one size fits all tightness adjustment. I do wear a size 7 3/4hat and after an hour you feel pressure on your ears. But, overall, the sound quality makes up for these minor annoyances.