: how accurate would you say it is at the farthest form? can you do both
: vertical and horizontal at once or would you need 2 lasers going?

Reply:
Accuracy? Just as accurate as the string method--matched up perfectly--a "straight line", as far as the light goes out from the level, and much easier on my eyes.
I bought one(laser level) for $10--it does only one verticle or horizontal line at a time, or can do a straight shot, two of them would be nice but I'm not in that much of a hurry.