is this chromatic? Can I set the tuner to other than 440?

Yes, chromatic. Calibration range from 410-480 Hz.

Is it auto calibration for each string?

I take it you're asking whether it auto-detects the pitch for each string, rather than the user having manually to select it for each string. Yes! It's really simple to use.

Is it safe to leave in a guitar with nitrocellulose finish?

I have had it in my Taylor for 10 months and just removed it to move it to another guitar. No issues with it affecting the finish. As with most anything that can attach to your guitar. Know what finish was used on it, guitars with nitro-cellulose finishes may show damage from the rubber pad on this tuner. I don't leave anything physically attached to my Martin.

what are the dimensions of this tuner? I need to check if it can fit with the sound board bracing of my Aoud before buying it. Thanks

This hits the bracing in one of my guitars. But this tuner is so tiny, just move it along the sound hole until you find a better fit. On a flat top guitar, this'll work wherever you place it around the rim of the sound hole. Your sound hole is 360 degrees. Just find a spot where it doesn't hit any bracing and you have a good line-of-sight to the display.

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

Product ID: 26492195

🌈Bright multi-color display for any lighting

🎯Extreme accuracy with piezo transducer

🔒Non-marring clip for secure, safe fit

€ 53.58

Duties & taxes included

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎸 Tune like a pro, stay in the groove—without missing a beat!

SAFE SECURE CLIP ON - Non-marring plastic clip protects your instrument’s finish while holding the tuner firmly in place.
VIBRANT COLOR DISPLAY - Multi-color screen ensures perfect visibility even in dimly lit venues or late-night jam sessions.
TRUSTED BY PROS WORLDWIDE - D’Addario’s 20+ years of innovation means you’re investing in quality and reliability.
INVISIBLE YET ALWAYS READY - Fits discreetly inside your guitar’s sound hole—tune on the fly without distracting your audience.
PRECISION TUNING AT YOUR FINGERTIPS - Piezo sensor picks up vibrations, not noise, for ultra-accurate tuning every time.

The NS Micro Soundhole Tuner by D’Addario is a compact, highly accurate chromatic tuner designed specifically for acoustic guitars and ukuleles. Featuring a vibration-sensitive piezo transducer and a bright multi-color display, it fits discreetly inside the sound hole with a non-marring clip, enabling quick, precise tuning in any environment. Loved by musicians for its reliability, ease of use, and protective design, it’s a must-have accessory for every acoustic player aiming for perfect pitch on the go.

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