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Bosch GLL40-20G Green Beam Self Leveling Cross Line Laser Level w/ MM2 Mount

<ul><li>Compact 40-foot cross-line laser design features green beams for visibility and self-leveling technology</li><li>VisiMax technology delivers maximum beam brightness, optimized energy efficiency and long-term tool reliability</li><li>Bright green-beam laser lines are up to 2X brighter than standard red beams</li><li>Cross-line mode projects two bright lines that are precisely level and plumb for a wide array of leveling and alignment applications</li><li>Included MM 2 Flexible Mounting Device clamps to multiple surfaces and provides a rotating 360° neck for quick setup and simple fine-tuning</li><li>Smart Pendulum System self-levels and indicates out-of-level condition;  pendulum locks when switched off to help ensure long tool life</li><li>0.25 inch to 20-inch tripod threading for use with MM 2 mount or tripod</li><li>Battery Voltage: 1.5 volts</li><li>IP Rating: IP 40</li><li>Laser Beam Color: Green</li><li>Laser Diode: Class 2, 500-540 nm</li><li>Leveling Type: Self-Leveling, Up to 4 degrees</li><li>Operating Temperature: 41 degrees Fahrenheit / 5 degrees Celsius to 104 degrees Fahrenheit / 40 degrees Celsius</li><li>Range: Up to 40 feet</li><li>Material: Plastic composite</li><li>Color: Blue</li><li>Dimensions (L x W x H): 3.2 x 2.3 x 3.2 inches</li><li>Weight: 0.5 pounds</li><li>Manufacturer warranty: 1-year warranty</li></ul>

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The Bosch GLL40-20G Green Beam Self Leveling Cross Line Laser Level with MM2 Mount projects visible green laser lines, which are up to 2X brighter than standard red beams.

The laser level tool has a working range of up to 40 feet and offers reliable accuracy of +5/6 inches at 30 feet. Bosch-exclusive VisiMax technology monitors the tool's temperature and power consumption to deliver the brightest line for the job, optimized energy efficiency, and long-term tool reliability. The cross-line laser is also equipped with a Smart Pendulum System allowing for automatic self-leveling and indication of out-of-level condition, as well as pendulum lock for safe tool transport. An included MM 2 Flexible Mounting Device provides a rotating 360-degree neck for quick setup and simple fine-tuning allowing for the laser to be clamped onto virtually any surface from 0.5 inch to 2.25 inch thick.

Make sure every job is on the level with the Bosch GLL40-20G Green Beam Self Leveling Cross Line Laser Level with MM2 Mount.

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[This review was collected as part of a promotion.] I have a Bosch red laser and a green laser.  My red laser was a GLL25-10 and last year I got a green laser GLL40-20G.  What a difference the green line makes!

When taken outdoors, they both do not work too well. Not sure the green is any better than the red.

Indoors, I do see a big difference.  When I put them together on the inside, about twenty feet back, this is what I see on the wall. They are both bright enough, I would say the green gives a crisper line.  The bigger difference is the green extends higher and lower than the red, see the red line stopped, but the green line is projected higher up on all the bottom chords.  

I have a number of photos that I wish to add, but the review program does not allow that and I am getting an error message when trying to add photos.  Hopefully I can add photos once the bug is fixed.

Nice laser very small footprint with bright line

boschtools.com

[This review was collected as part of a promotion.] I'll level with you - this is a great tool. The green lines are nice and bright. Used it to hang some cabinets and a shelf and they're perfect! Had a cheaper competitor model from years ago and this one looks and feels better.

Bright lines; awesome tool

[This review was collected as part of a promotion.] If you need level lines throughout a room, this is great. Very bright also, even in the daytime. Liked mine so much I bought one for my friend!

Nice bright lines!

Works pretty great if you bother to read the manual. Which clearly is the reason people don't seem to get it. I believe you have to start out within 4 degrees of level. No it's not the Hubble Telescope. Compound, neck breaking angles are tough at this price. Adjust. Don't tighten it down until it stops blinking. Hold it steady and tighten. Works.

Read

I work in a hospital and do alot of work in offices or patient rooms no bigger than 20x20 and this laser is more visible than my red 360 laser! 
Great for an interior professional or DIY'ER!
Is this model compatible with a detector to increase the range?
Thanks!

Great laser for the price!

The ad for this laser level shows it being used at an angle. Even the Operating and Safety Instructions show the instrument used at an angle on page 4. But in reality this cannot be done without the laser lines flashing. This is deceptive.

Deceptive advertising

I've had this laser level for about 2 months. There are good thing about this and some bad things about it.
Good: easy set up and clear green line. 
Negative: it uses batteries quickly. And due this the battery ports don't connect well after a couple of changes. I can't get the laser work unless I have the batteries just right. Not working right now with new batteries.
Also the switch has to be toggled several times in order to get the laser on
Maybe I have a faulty one because Bosch usually has excellent tools. 
Kinda disappointed with the whole tool.

Alright but...

While the lines are bright, the reach is quite limited.  Additionally, there is a picture on the box showing the device can be used at angles (such as to get a straight line matching the angle of a stair rail).  However, it can only be used at up to 4 degrees +/- from vertical/horizontal or the line flashes on and off.  There seems to be no function to disable the flashing.  I will be returning this product.

Misleading packaging

I bough this product 3 months ago and the in the second time that I am using it the light is blinking

The light of my BOSCH GLL40-20G blinks