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Bosch GLL 30 Self Leveling Cross Line Laser Review

What is a self-leveling laser level? How does it work? Is it really useful? Are there better alternatives out there? Let’s put these questions to rest once and for all.

A laser line level is a tool that helps you create straight lines on flat surfaces such as walls, floors, ceilings, or even other structures. They come in various shapes and sizes, but they all require a certain amount of skill to use correctly.

Reading which is the best laser level for builders will help you to find the right one for you.

If you want to ensure accuracy, it is important to practice using laser levels before using them in your projects. The Bosch GLL30, however, has changed the game entirely. This new model is designed as a true self-leveling laser level.

Let’s review the Bosch GLL Self-Leveling Cross-Line Laser and see what makes it a good choice.

What Makes this Laser Level Unique?

The bosch self-leveling cross line laser gll 30 is excellent because it eliminates the need for any external reference point. That means you don’t have to worry about finding a wall stud or another structure to use as a reference point. 

You simply set up the laser level where you want it and proceed with your project without adjusting anything!

Does the Bosch GLL 30 self-leveling laser level work with AC and DC power sources?

Yes, the Bosch GLL-30 works with either type of power source. It will automatically switch between AC and DC power sources depending on which one is available.

The Bosch GLL 30 Features

The Bosch GLL 30 Self Leveling Cross Line Laser  has many great features that differentiate it from the rest of the competition in the market. [1] Look at what makes it more unique and why you should have it in your tool arsenal.

GLL 30 Self Leveling Cross Line Laser Lines of Measurement

The Features of the Bosch GLL 30 self-leveling cross-line laser:

  • True self-leveling technology eliminates the need for external references
  • Works with both AC and DC powered tools
  • Easy to read LCD display
  • Adjustable tilt angle from -5° to +45°
  • Includes a 5m cord
  • Measuring range from 0.1 mm to 10 cm (0.4″ – 4″)
  • Accuracy ± 0.02 mm / 0.008 inches
  • Battery life of up to 3 hours


  • Dimensions: H: 2.9″ x W: 6.8″ x D: 3.7″
  • Measures up to 1.2 m (3 ft.) in length
  • Weight: 9 oz.
  • Power Supply Type: AC/DC
  • Measurement Range: 0.1mm ~ 10cm (0.4″~4″)
  • Display Resolution: 1024×768 pixels
  • Operating Temperature: 32°F ~ 95°F (0°C ~ 40°C)
  • Storage Temperature: -20°F ~ 140°F (-4°C ~ 60°C)

What Makes it a Great Choice?

If you’re looking for a laser level that doesn’t require external references, you’ll love the Bosch GLL30. Not only does it feature self-leveling technology, but it also comes with a handy LCD. In addition, it features adjustable tilt angles so you can position it wherever you need to measure.

Check our guide to know which is the best laser level for indoor use.


  • Comes with a handy LCD
  • Self-leveling technology eliminates the need for extra equipment
  • Can be used with both AC and DC tools


  • May not work well in low light conditions

How To Use It?

In this Bosch gll 30 self leveling cross line laser review we’re also going to explain how to use it properly.

Simply plug the unit into a power outlet and turn it on to get started. Then move the laser beam over the area you’d like to measure and press the “Start” button. The LCD screen will show results when the measurement begins. [2]

First, make sure the laser beam is pointed towards the center of the screen to adjust the tilt angle. Next, rotate the adjustment knob until the desired angle appears on the screen. Finally, press the “Set” button to save the new setting.

You may notice that the laser beam seems to jump around while making measurements. This happens because the laser beam bounces off nearby objects before reaching its destination.

Read our review also about Dewalt dw088cg green laser.

If this bothers you, try moving the laser closer to the surface you’re working on. The more distance there is between the laser beam and the measured object, the less likely it is to bounce back and forth.

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