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Review title: Hard to keep up on the wall
Product review: It doesn't auto-level. There is a bubble-level built in that you use when hanging the level on the wall. They give you this tacky putty stuff that I remember my elementary school teachers using to put posters up on the wall. That is how this is meant to be attached to a wall. Not a very precise method, and doesn't hold up for very long, maybe a few minutes. And even if it does hold up, it tends to drift off level as the putty starts to shift.
