Guitar Tuner - NS Micro Guitar Sound Hole Tuner - For Acoustic Guitars, Ukuleles - Non Marring Sound Hole Clip - Quick & Accurate Tuning

I’ve put these D’Addario NS Micro Soundhole Tuners on four of my acoustics because they’re that good. They’re tiny, stay hidden inside the soundhole, and don’t mark the guitar. Most importantly, they’re accurate — I compared them to my Peterson strobe and the results were impressively close. They’re always ready when I pick up a guitar, easy to read, easy to use, and switching them on and off is effortless. I check tuning every time I play, and these make it instant. Battery life seems solid so far. A brilliant little tuner that just works.

I purchased this item with my own money and have not been provided with any incentives to provide this review. This is my favourite tuner, its sleek, accurate and easy to use. Hardest part is placing it inside the sound hole of the guitar. Good value for money, battery lasts well, is easy to see and use and allows you to look at the specific string and see where adjustments are required unlinke many other tuners that are either clipped onto headstocks or connected via amps etc. Makes a great gift for any acoustic guitar player or a great addition to your kit to replace an old tuner.

I'm a novice guitar player and wanted a simple tuner that would also allow me to tune to alternative tunings - my headstock tuner doesn't do this. This little gizmo does exactly what I want and was easy to fit on my guitar and works perfectly. Why only 4 stars then? Well, that's because there were no instructions included and not even a link to a website! OK, it's a tuner - doesn't need instructions. But what about the calibration button? The engineer in me thought I'd have to calibrate this against a reference because with measuring equipment that's what you do! A quick Google informed me that there is a global standard for the frequency of the note "A" and that is what the tuner is set at. Why wasn't that info included in the blurb somewhere? I then discovered that in some cases, some musical instruments may be tuned a few Hz higher or lower and this calibration button allows you to get in tune with them. Like I said in the first line - I'm a novice - and now I've learned something.

This is an astonishing, simple and discreet bit of kit. It works on all the strings of a 12 string guitar which are known for being difficult to tune. You can also use it for open tuning. For the price you cannot go wrong. There is a warning on the box that the clip that holds the tuner in place can react and leave a mark on certain finishes. I've got it fitted on my 12 string guitar tuned down a semi tone. It's very accurate to my ear. I can't comment battery life as I have only just recently fitted it. In general most reviews are very positive about this tuner and I think it's worth the money.

A neat little tuner that clips on OK (Guild D-50). It has survived it's first pub gig and worked as advertised - easy to see the display in low light too. I think the key to this device is to fit it where there is a single thickness of wood. On my guitar there was only one point where there wasn't soundhole reinforcement strips underneath and the pickguard was not too close to the soundhole - you need at least 7.5mm from the edge of the soundhole to the pickguard (if fitted) to fit this - I hope this helps. Update: Still working fine 11 months and 70 gigs later and on original battery. Has only once fallen off and ended up rattling around inside the guitar like a 2 ton plectrum. It's fitted to a sound board that is 3mm thick - any thicker I think puts too much strain on the clip which is probably why some people have had them break (minimal instructions with product don't give any guidance on this, though I note that their website now says 3.81mm thickness) Update 2: Three years of use and still going strong and battery life is good - the only other issue I have found is if you are playing outside on a sunny day as during Covid, the display is very difficult to see. Hope this helps.

Works really well.

Nice and compact and hidden, all qualities I like. Not too strong hold so if not placed against something might fall inside when the start button is pressed. I place it against one of the bars inside the guitar and it doesn’t move or falls in. Apart from that, seems a good buy for someone who wants it hidden and not too obvious and also always there. Tuning seems accurate and on point. I like that it is easy to read and the display is bright enough to be seen even on daylight. So far pleased with it.

It works well, but beware tuner falling off and into the soundhole. The clamp needs a tighter fit. Also if you’re short sighted, you’ll need glasses to read it.

It works great, feels like it was factory installed and is all but invisible. SO much better than having a bulky clip on tuner on the headstock, falling off, getting lost, left at home when you need it at a gig. This thing is great. If there was an improvement I would suggest that the screen be a bit bigger and a bit brighter. You have to get the viewing angle just right to see what you are doing. But I would recommend this product for sure.

Das Gerät ist sehr praktisch und kann permanent montiert bleiben. Besser als die Clips für den Gitarenhals.

Discret, fonctionnel. Peut rester accroché à la rosace aucune gêne. Bon produit

Nice and discreet. It will make you look like as if you are tuning by ear. lol Quick and precise tuning. The only nitpick I can think of is, it's not so tightly clamped to your soundhole and you might accidentally flick it off while strumming hard.

What a brilliant design. This is the best acoustic tuner I’ve ever used. It works for all tunings, has a clear, easy-to-read display in the sound hole, and is almost invisible to an audience. It’s padded, so it won’t harm the finish, and you can just leave it there all the time! You can’t drop it or knock it off like a headstock tuner. It’s not expensive, but now I want to buy one for each of my acoustics! Any negatives? Well, being under the top string in the sound hole, it’s a bit fiddly to turn on/off, but you get used to it.