Instruct: Classify Amazon reviews into positive or negative sentiment
Query: best component ever

I have used this product for over 5 years, in over 400 presentations, totaling over 3,000 hours and I haven't even had to change the batteries once! I make most use of the volume control button while playing videos or music during lectures and seminars. Works for me about 100 feet (33 meters) away from my computer with no delay.