This is a hand-held laser ruler, through the three-stage adjustment of the input distance, can emit the corresponding length of laser rays, simple operation, easy to use, data
2018-07-02
Tools&Equipment
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There is no way to control the length of the laser. It's not Star Wars. If it's just a laser distance, it's useless to press such a button, maybe I don't understand it. The design instructions are not clear enough.