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Here's a veritable wunderkind of measuring devices—-the Marksman does everything but buy your project materials for you. We're impressed with how many functions this little unit performs and how easy it is to learn, taking the place of a whole pile of tools, including the pencil. You'll probably use it most often as a measuring device because it beats the tar out of the old metal tape. Just aim it and click, and sonic waves bounce back, letting the unit calculate distance at nearly any angle, thanks to the neat pivoting head. Remember the last time you measured a room for paint or wallpaper? It's tedious work. But the Marksman does it in a few seconds and saves you the trouble of measuring again, too, because you've forgotten the numbers: It stores the results for you. If that's all it did, we'd still call this a winner, but that's just the half of it. It's also a smart stud finder, a calculator and laser pointer. It's incredibly easy to use, the display is easy to read and there's nothing like traveling light. A great addition to the toolbox of anyone from a home owner to a home decorator to a home builder.--Kris Jensen-Van Heste
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Good for Indoors !
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Very good for indoors, longer distance than 20 M , doesnt work ! it have Power A/C detector , Metals and pipe Detectors, Construction Columns detector ! Super One ! I wish if it have a real laser meter, but this works only by Ultra Sonic waves, the laser light is only for pointing !
Rating: 
(4
out of 5) @ 2008-12-16
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item sold as new but looked as if it was used!
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The item came with a few scratches, dirty and the 9v battery HAD EXPLODED!!! It had stuff from the inside coming out...
Very bad!
Rating: 
(1
out of 5) @ 2008-08-12
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Useless and largely a waste of batteries.
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Good points: it has a laser, and lasers are cool.
Bad points: it doesn't locate studs, and the laser measurements are humorously and wildly inaccurate.
If you have plaster and lathe walls, chances are this will not work for you, as it did not work for me. Actually, I tried it on a gypsum board wall and it failed to locate the studs there, too. It does detect electricity presence, but is not very accurate in locating the actual conduit. Also, if the conduit isn't actively charging, it will not find it. Even with the device in "metal" mode, it would not find conduit.
The laser measurements are 100% unreliable. I can shoot the laser and get 35 inches for a variety of distances. Sometimes it looks almost accurate, but shooting with a slight change in location leads to different results. Conclusion: it doesn't work.
I completely do not recommend buying this at all. I recommend returning it if you own, and avoiding it if you do not. Furthermore, I advocate taking your friend's device and surreptitiously breaking it so it no longer screws them up.
-C
Rating:
(1
out of 5) @ 2008-05-10
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Cheap Distance Measurer that works
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This unit measures lengths much better than I expected, even in rooms with obstructions. It comes with a 9-Volt battery and a carrying case. Besides home improvement and construction jobs, the measurer is also great for real estate related tasks.
I am giving the Black & Decker BDSM400 five stars because I think it offers great value for the money. If you are willing to spend extra, then I am sure you can find something more sophisticated.
Rating: 
(5
out of 5) @ 2007-06-14
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It ok.
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Works great when measuring in quiet spaces. It's really precise on measuring distances. I haven't used the other functins (find metal o electric wiring inside walls).
As i said before, it works graet on quiet spaces. I tried to use it while an electrical storm was outside, and it measured unaccurate distances. I beleive the problem was the noise entering the rooms, since this is a sonic device. Other than that, it works just fine.
Rating:
(4
out of 5) @ 2006-08-28
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