These things are really handy if you have to carry around an ethernet cable with your notebook. the cord itself is extremely thin so the retractor box is pretty small (probably about 2"x3"x1/2") and lightweight. it is sooo much nicer than regular cords that are always getting tangled up and hanging all over the place. A couple of critisms though: the cord comes out of both ends of the retractor simultaneously. Thus, the retractor is always exactly halfway between the two ends of the cord which can be annoying if you want to put the retractor in a specfic spot. also, the spring mechanism doesn't quite get the cord to retract all the way into the retractor because the jacks get hung up on the case. it's not a big deal, but you just have to push both jacks into the little holders manually.
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