D'Addario 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.

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.

Great little gadget, works a treat and means you don't have a stupid tuner poking out the top of the guitar head.

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.

I bought this to replace an old tuner Intelli tuner which, to my mind, nobody has beaten yet for ease of use and accuracy. Now, this micro sound hole tuner works well enough as an "approximate" tuning device but it has one major drawback which is not made plain in the description: it will not clip to a sound hole with a scratch plate. Seriously, this is a major and dismal oversight. Most modern acoustic guitars have a scratch plate and those scratch plates double the thickness of the breast at the sound hole. Not only that but the scratch plate does not, in most cases, come up to the edge of the sound hole. The upshot of this is that you can't clip this thing where it's meant to go: directly beneath your line of sight as you look down at the strings. So, I've had to clip it beneath the strings where it can’t easily be reached to turn it on by groping a finger under the strings - not exactly a graceful move when you're trying to look cool in front of an audience. Simply put, it works, but it's of little use - and it's expensive. Update:- And its grip on the guitar is not strong so eventually, it'll eventually fall off and you'll lose it - which is what has happened to mine

Nice and unobtrusive soundhole tuner. Nicely thought out design. Works well and reasonable price. Display easy to see. Second one I've bought. Not sure how long the battery would last but easy enough to replace.