Review on Firecore F335G 5-Point Green Beam Self-Leveling Alignment Laser W/ Magnetic Bracket - Accurate & Easy To Use! by Dan Weeman

I didn’t rate accuracy as there is no way to check the calibration of this unit. It’s extremely easy to set up and use but without a calibration chart or something to compare it to, it’s difficult to say that it’s operating within the advertised spec’s. No problem seeing the green laser dots - very bright! Mine didn’t have any polarity markings, + or -, in the battery compartment so pay attention when you insert the batteries, metal raised tab is positive and spring tab is negative.