Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can't listen at the same time

Bought for a great price. Plugged into Ford Focus and then into Sansa FUZE, but music stopped and only heard buzzing noise through speakers. Good for when you don't need to actually LISTEN to the music, but I would stick to charging it at home before you leave. Red indicator light on product, and batter-charge icon appears on mp3 player so you know when it's done charging. Emergency-only type of product here.