Two advantages for me were the price and availability of green light versus red light laser beam. Green laser light is more expensive to produce but easier to see than red, especially outdoors. With a $5 coupon I only paid $10 for this red light laser I was considering. The device is well padded and feels solid. Much CAUTION in the instructions for setting it to LOCK when handling to protect the fragile self-leveling mechanism. Vertical and horizontal lighting is perfectly visible on my interior walls. I look forward to getting started with this and will update this review if I find any flaws.
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