Useful little gadget It does come in handy reading maps and trying to find stuff in the glove box!!I liked these. Nice and bright. Very small.Better than other thumb lights I've used in the past. Very bright and easy to activate (doesn't bust your thumb trying to turn it on). Uses two CR2016 batteries, easy to replace. Also, nice switch feature so I don't have to constantly squeeze to have it on.Super bright light for the sizeExactly as described. Bright light on key chain helpful for finding door lock in poorly lit hallways/black out, objects that fall under a table/sofa etc.Fast shipping, good quality, received all product nothing missing, super bright!!!