I bought this used online, but I don't understand how to set it up. It seems to be locked, and I don't know how to unlock it. Since I don't need it, I'll sell it cheap to someone who knows more about it. (Sold as junk) The band is black, size L. I can answer some questions about the appearance, etc., but I'm ignorant about the internal workings, so there may be things I don't know. However, I'll try to answer to the best of my ability. Picture 11: Has scratches Red circle Price reduction