Summary: I wanted to love this, but the case design is poor: it repeatedly unscrews itself while in a pocket or backpack and the tiny, tiny batteries and little screws fall out. I've recovered the parts 2x, but finally lost enough parts so that there's no recovering function.
Summary: This little light easily clips onto a keychain. Nice and bright. Accidentally left it in a jeans pocket and put it through the washer and dryer. Thought it was ruined, but it lit right up again!