The box is the size of a medium-sized book, and weighs about a half-pound.
My wife bought one from QVC a few weeks ago for around $105. We have a 2005 Town and Country van that only gets used a couple of times per month for short trips, and the battery discharges if we do not start the vehicle once a week. My wife used it to jump start the van today as a first try, and it worked like a charm!
Technology reigns.... The old fashioned jumper cables are now obsolete...