Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No ac adapter included, require 4 C cell battery

I ordered this speaker because it's cheap and review seemsOK. However, to my surprise, it need 6V ac adapter butdoes not include it. Or it can use 4 C cell batteries (notAA or AAA) but also does not include them. Without batteryor ad adapter, the sound is so small. But if include theprice of an ac adapter or the batteries, this speaker isnot cheap at all. Not recommend it.