does this do open tuning?

Not specifically, it reads out the note that is being played. You can tune the strings to whatever notes you like as it is a chromatic tuner, but it does not have specific settings for open tunings.

What is detection accuracy in polyphonic mode?

I don't know for sure but since the other answer described the display of the notes, I'm going to guess that the polyphonic mode (though dependent on your instrument) probably reads 'in tune' when the pitches are within 1-2 cents of the assumed pitches. I too would like to know Polytune's official answer to your question. I'm assuming their .02 cents refers to a totally pure, fundamental heavy articulation of the note being measured. Plucking technique and observer bias can cause all sorts of different observations (accuracy/inaccuracy) but intonation of Em7sus4 chords are definitely averages of harmonic content, I'm not sure it's possible to decide on a specific frequency (at a resolution of .02 cents) when the instrument is moving sympathetically to other pitches. The Polyphonic feature is really for when you don't have time to tune it note by note but you need to have the confidence that you'll be close enough not to come across as deaf to your own sound.

Is the auto off defeatable? A few minutes is unacceptable. I need it to stay on.

I’m not sure what you’re using it for, but if your stringed instrument won’t stay in tune for more than a few minutes, you might need a more robust instrument. And it should stay on as long as it’s recognizing the tuning activity. I’ve never had one power off while I’m tuning up. Play hard, rock on.

Tc Electronic Polytune Clip Clip On Tuner With Polyphonic Strobe

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Description

🎶 Tune smarter, play sharper — the future of tuning is clipped on!

PRECISION THAT PROS DEMAND - Switch between chromatic (±0.5 cent) and ultra-accurate strobe mode (±0.02 cent) for flawless tuning every time.
VERSATILITY MEETS CONVENIENCE - Flat tuning and capo modes cover all your tuning needs, making this clip-on tuner your ultimate gig companion.
TUNE EVERY STRING IN ONE STRUM - Polyphonic mode lets you instantly check all 6 strings simultaneously—speed up your setup and never miss a beat.
READ IT ANYWHERE PLAY ANYWHERE - Adaptive 108-LED matrix display stays crystal clear from any angle or lighting condition—even behind the headstock.
BUILT TO LAST DESIGNED TO IMPRESS - Sleek stainless steel clip combines durability with a minimalist aesthetic that complements your instrument.

The TC Electronic PolyTune Clip is a cutting-edge clip-on guitar tuner featuring polyphonic tuning to check all six strings simultaneously, an ultra-bright 108-LED adaptive display for easy reading in any orientation, and highly precise chromatic and strobe tuning modes. Its durable stainless steel clip and versatile tuning modes make it an essential tool for electric and acoustic players seeking fast, accurate, and stylish tuning on the go.

Specifications

ASIN	B00ZU4G0ZK
Amperage	0.1 Milliamps
Best Sellers Rank	#1,450 in Musical Instruments ( See Top 100 in Musical Instruments ) #29 in Music Tuning Accessories
Brand	TC Electronic
Brand Name	TC Electronic
Color	standart
Connector Type	1/4 inch audio jack
Controls Type	Knob
Customer Reviews	4.6 out of 5 stars 3,167 Reviews
Global Trade Identification Number	05706622021847
Hardware Interface	1/4-inch Audio
Included Components	TC Electronic POLYTUNE CLIP, Clip-On Tuner with Polyphonic, Strobe and Chromatic Modes and 108 LED Matrix Display for Ultimate Tuning Performance
Item Dimensions	1 x 2 x 3 inches
Item Dimensions L x W x H	1"L x 2"W x 3"H
Item Type Name	Guitar Tools
Item Weight	0.03 Kilograms
Manufacturer	Music Tribe US
Manufacturer Part Number	P0DFU
Model Name	Polytune Clip-On Polyphonic Tuner
Model Number	POLYTUNE CLIP
Power Source	Battery Powered
Product Dimensions	1"L x 2"W x 3"H
Signal Format	Analog
Style	Clip
UPC	713803229850
Unit Count	1.0 Count
Voltage	240 Volts
Warranty Description	1 year parts and labor.

Reviews

D**E

2.02.2026

D**N

20.07.2025

K**L

4.01.2025

J**J

17.01.2026

M**Y

28.01.2025

E**M

11.02.2016

G**E

13.03.2026

H**S

25.01.2026

F**L

20.06.2016

A**O

11.11.2016

S**N

15.08.2017

F**R

14.05.2023

A**Z

8.11.2025

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₩106506

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In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

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TC Electronic POLYTUNE CLIP Clip-On Tuner with Polyphonic, Strobe and Chromatic Modes and 108 LED Matrix Display for Ultimate Tuning Performance

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