With its sleek styling and double act as a portable USB charger, there's plenty to like about Braven's line of Bluetooth speakers. Indeed, we listed the 625 in our back to school guide earlier this year as an alternative to the pricier Jambox. But if you were hoping to snag something even cheaper, you might want to check out the Braven 570, which is set to debut this Sunday on QVC for $100. Similar in looks with its Six Series brethren, the tiny music machine has six watts of
