Instruct: Classify an Amazon review as either positive or negative.
Query: Murali from Greenbay, WI

I bought this set from Amazon.com, around 6 months back. The brand and the instrument seems to be great, but NOT really. Call volume is VERY LOW even on speaker. I heard compliants many times about the quality of voice, volume, battery go dead so quickly.., which I never had ...[...]