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Internet # 327671623

Model # GLL50-20GL

Store SKU # 1010431723

65 ft. Dual Power Battery Green Beam Self-Leveling Cross-Line Laser Level with Lithium Ion Battery

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  • Power flexibility for use with AA or a 3.7V 1.0 Ah batteries
  • Maximum line visibility and brightness with VisiMax Technology
  • Jobsite tough, IP 55 rated with full rubber overmold housing
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Product Details

About This Product

Bosch GLL50-20GL Green-Beam Self-Leveling Cross-Line Laser projects 2-bright, level and plumb green beams that are up to 4X brighter than standard red beams. Featuring a 65 Ft. range that allows for leveling within a ¼ In. accuracy at 30 ft., it's a must have for any tool bag. With its power flexibility, operate using the included Bosch 3.7-Volt Lithium-Ion 1.0 Ah Battery that can even be used while charging to diminish downtime or with 2-AA batteries (sold separately). Built-in VisiMax technology optimizes line visibility and runtime for working conditions to further maximize usage. Its ergonomic, compact, lightweight design and IP 55 dust and water-resistant rating, provide for both comfortable and dependable operation. The full rubber overmold housing helps protect every major impact point, acting like a roll cage to safeguard the tool. Equipped with a Smart Pendulum System, the tool self levels, will indicate any out-of-level condition and then locks when switched off for secure transport. Simply tilt the laser to use the lines at an angle with ease. Position the tool with the included integrated magnetic mount or utilize the ¼ In. threading mount that fits with like-sized tripods.


  • Power flexibility - works with included Bosch's 3.7-Volt Lithium-Ion 10 Ah battery or 2-AA batteries (sold separately) for less downtime on the job
  • Built-in Visimax technology - monitors power consumption to maximize line visibility and extend battery life
  • Bright green-beam laser - projects up to 4x brighter than standard red beams
  • Full rubber overmold housing - helps protect every major impact point, with a design similar to a roll cage
  • Integrated multipurpose laser mount - positions and mounts with magnets or threaded mounts (1/4 in.-20)
  • Jobsite tough construction - IP 55 rated, offering dust and water resistance
  • Cross-line mode - projects 2-bright, level and plumb lines
  • Bright, thin lines with 65 ft. range - level within 1/4 in. accuracy at a 30 ft. range
  • Smart pendulum system - self levels, indicates out-of-level condition and locks when switched off for secure transport
  • Ergonomic, compact and lightweight - making the laser easy to use and easy to store
  • ¼ in. threading mount - fits all tripods with 1/4 in. thread
  • Secure laser transport - after switching off, pendulum locks for secure transport
  • Click Here to Shop the Compatible 3.7V Lithium-Ion 1.0 Ah Battery
  • Click here for more information on Electronic Recycling Programs
  • Return Policy

Product Information

Internet # 327671623

Model # GLL50-20GL

Store SKU # 1010431723

Additional Resources


Dimensions: H 2.5 in, W 3.9 in, D 4.1 in


Product Depth (in.)

4.1 in

Product Height (in.)

2.5 in

Product Width (in.)

3.9 in


Battery Type Required


Compatible Battery Type

AA Batteries





Hand Tool Type

Laser Level





Laser Color


Max Laser Distance (ft.)

65 ft.

Measurement Accuracy (in.)

±1/4 in.

Number of Batteries Required


Number of beams


Number of Measurements




Tools Product Type

Hand Tool

Warranty / Certifications

Manufacturer Warranty

Bosch measuring and layout tools are covered by a one year limited warranty with an additional year when you register your tool within eight weeks of purchase - for details, call 1-877-BOSCH99

Questions & Answers

Q:Does it shot angles ? So could I find a 90 degree for a wall layout or stairs ?
by|Jun 20, 2024
0 Answer
Answer This Question
Q:Can you level ground with it?
by|Jun 5, 2024
1 Answer
Answer This Question

A:  Thanks for asking! The laser tool is suitable exclusively for indoor operation in enclosed working sites. For further assistance, you may email us at bosch.tools@us.bosch.com or contact us at 1-877-BOSCH99 (1-877-267-2499) from Monday through Friday, 7 a.m. to 7 p.m. CST.

by|Jun 15, 2024
    1 found this answer helpful
    Q:Will this fit on a camera tripod? Should be a standard camera thread size.
    by|Jun 3, 2024
    1 Answer
    Answer This Question

    A:  Hi! You can utilize the 1/4 In. threading mount that fits with like-sized tripods. For further assistance, you may email us at bosch.tools@us.bosch.com or contact us at 1-877-BOSCH99 (1-877-267-2499) from Monday through Friday, 7 a.m. to 7 p.m. CST.

    by|Jun 15, 2024
      1 found this answer helpful
      Q:Es recargable
      by|May 30, 2024
      0 Answer
      Answer This Question
      Showing 1-4 of 57

      Customer Reviews

      4.4 out of 5

      • 4.4 out of 390 reviews
      • 91% recommend this product
      Filter by:
      Showing 1-10 of 390 reviews
      great product, not what I need
      great product, not what I need, here is what it can do, hope this helps others to know what they are buying so they can avoid the same mistakes.
        • Recommended
        Very accurate and visible laser
        When I do jobs indoors, that require plumb lines or level lines, using a laser is the way to go. And this laser is great. And I really like the red line and how crisp it is. I used it to line up cabinets I was installing and framing a wall for a shower. And everything came out level and straight. But first things first I always check for accuracy before I use it just in case. On the box it says plus or minus 5/16 at 30 feet. And I checked it at Several distances, and all of them were really accurate. Of course, the closer I got the more spot on it was. But it was definitely spot on also even when I scooted back. I really like also how it came with two batteries because those are the things we don’t think about sometimes when we buy something for a job until it’s at the job site and we open it. I really like the laser and it feels really good quality, and it should last many years to come. I’m going to get a carrying case for it to take care of it. I definitely don’t want this being tossed into boxes because it’s a tool for accuracy. It’s good quality and I’m pretty sure it could handle it but I’d say it’s better to take care of it. The 360° on it is awesome and I’m able to mount it to my stand as well. All around a great product and would recommend to anyone whether it’s a homeowner hanging pictures or a contractor for jobs
        • Recommended
        easy to use
        This is a very straightforward self-leveling cross line red laser level. It has a 50 foot range with an accuracy of +/- 5/16” at 30 feet and is powered by two AA batteries which are included. The included Useage Guide gives general and battery safety rules, with a QR code link for detailed operating instructions. A slide ON/OFF swtich is provided on the side of the body, the body rotates on its base / back plate, with a detent stop when the laser lens is “captured” by the back plate - protecting the laser lens since a case is not included. The back plate has 4 very strong magnets as well as a slotted screw hole and 4 small rubber feet. The base has a standard 1/4” tripod screw hole and 4 small rubber feet The level is self correcting to a deviation of 3.5 degrees and will flash on and off if exceeded.
        • Recommended
        Versatile Laser Level of High Quality
        BOSCH GLL50-20GL is a self-leveling device with a cross-line laser and comes with Li-ion Battery installed and an option to use 2xAA batteries. The rechargeable battery has a USB type C port, so can be recharged using a smartphone charger. The charging cord is included. The device is self-intuitive and using it to the fullest does not require any reading. It can be attached to a nail in the wall, on a photo tripod using the port, attached to a metal door of a truck, or to a metal post with the magnet side of the tool, lastly, it can be placed on any surface and its self-leveling with do the rest, which is the most pleasant part. All you do is adjust height and point to a corner of an object to be leveled. I have only a positive impression of this fine optical instrument, which I am glad to own and would recommend it to a friend.
        • Recommended
        Awesome tool made by a trusted brand!
        The Bosch Self-Leveling 50 ft. Cross-Line Laser Level is a must have tool for both contractors and homeowners. Range is 50 ft with an accuracy of plus or minus 5/16 at 30ft. The 1/4 mounting thread worked great with my universal tripod. It also has a magnetic back as another mounting option. I played around with this at the house and found that not much in my house is level or plumb. Especially my pictures hanging on the walls. This tool makes it easy to fix them. Bosh provides the required 2 double A batteries and a rechargeable lithium battery is available to purchase separately. The laser is easy to see and self levels and plumbs. I love this tool, the price is great and it’s a no brainer.
        • Recommended
        Rugged Laser Level
        This self-leveling 50-foot cross line laser level (manufactured by Bosch) looks as rugged as the description says. I specifically liked that it included two batteries but can be used with Bosch's 37-Volt lithium-ion 10 ah batteries (sold separately). “Assembly” is easy: insert the two “AA” batteries and go! The laser level has a standard ¼-inch threaded mount on the base. There are no surprises, and it definitely does NOT disappoint. FYI: The “IP” rating is also known as an “Ingress Protection Rating” or an “International Protection Rating” for electrical enclosures.
        • Recommended
        Fantastic laser for many projects
        I have needed one of these on so many projects lately, so I finally was able to grab one. This one has quite a few features that makes it a great purchase. The laser itself is self-leveling which is great, and the laser itself is quite bright. I can clearly see it across a decent sized room. It has several mounting options including tripod support and a magnetic plate. It has an optional rechargeable battery pack which I will definitely pickup later. Overall, this is a great laser with so many uses especially for the homeowner.
        • Recommended
        Great entry level laser
        Nice basic 2 plane, self leveling laser lever here. It shoots a red horizontal and red vertical line. I think the former model only went to 30 feet. This new one with a brighter laser goes to 50. It has a magnetic base and a nail hook to mount it to anything metal. Magnet is pretty strong on bare metal but does not stick to corner bead. The on off switch is also the lock to keep it from rattling in transit. Reads true and super handy for getting things quickly level and perpendicular.
        • Recommended
        This one delivers perfect lines
        The Bosch 50' self leveling cross line laser is a must when working with items that need to be hung. Thanks to this level we discovered that some of our wall hangings were slightly off. This easy to use level is accurate. We mounted it on a tripod and it worked perfectly. 50' range is plenty for projects around our home. The laser line is very easy to see. When walking around the room, we got some bouncing of the line, but solved that by moving it in the hallway. The best part is our pictures are hung perfectly level. This is a must have, I highly recommend it.
        • Recommended
        My first laser level
        Not that I have not looked at a few, I’ve just could not justify the cost for what I would normally use one for. Things have changed. I moved and besides having a full house of picture hanging I need to do, I also got a 30 foot by 30 foot shop. First I used it to make sure Texas was hung correctly, my wife’s pet project. I had to double check it with a regular level and it was spot on. Then I took it out to the shop. Metal all around to make use of the magnetic base and where I expect to get the most use out of this. The shop is going to be a blank space for me to build my dream shop. Soon as I get it all unpacked, I’ll be going to town building as much as I can by hand. To make it look right, things are going to have to be level and in line. No better way to do it than a laser level and this one seem to be a top of the line model, now I want to go get some of the great accessories you can get for it.
        Response from BoschToolsJan 22, 2024
        Thank you so much for your rating and review. We are thrilled to know that you choose us as a brand to get your first laser. For further assistance, you may email us at bosch.tools@us.bosch.com or contact us at 1-877-BOSCH99 (1-877-267-2499) from Monday through Friday, 7 a.m. to 7 p.m. CST.
        • Recommended
        2 found this review helpful
        Showing 1-10 of 390 reviews