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.

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tc electronic ポリフォニッククリップチューナー POLYTUNE CLIP

tc electronic ポリフォニッククリップチューナー POLYTUNE CLIP

Product ID: 733560166

Details

スタイル
POLYTUNE CLIP
ブランド
Electronic)
商品の寸法
25長さ x 51幅 x
商品の重量
0.03 キログラム
色
WHITE

⚡±0.02 cent strobe tuner precision

🎸Polyphonic tuning for all 6 strings at once

🔄Auto-rotating display for any clip angle

HK$506

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Description

🎶 Tune like a pro, anywhere, anytime!

CLIP GO DESIGN - Compact, lightweight clip-on tuner that stays out of your way but always in sight.
LONG LASTING POWER - Optimized battery life means more gigs and less downtime.
SMART AUTO ROTATE DISPLAY - No more fiddling—display orientation adjusts automatically to your playing position.
PRECISION THAT PROS DEMAND - Ultra-accurate strobe tuner mode with ±0.02 cent sensitivity ensures your sound is pitch-perfect.
TUNE EVERY STRING INSTANTLY - Polyphonic mode lets you see all 6 strings tuned simultaneously, saving precious practice time.

The tc electronic PolyTune Clip is a compact, clip-on guitar tuner featuring three versatile tuning modes: polyphonic for tuning all strings simultaneously, chromatic for single-string tuning, and an ultra-precise strobe mode with ±0.02 cent accuracy. Designed for convenience and speed, it includes an auto-rotating display that adapts to any clip angle, a lightweight form factor, and extended battery life, making it an essential tool for professional and aspiring musicians alike.

Specifications

ASIN	B00ZU4G0ZK
Amazon 売れ筋ランキング	楽器・音響機器 - 174位 ( 楽器・音響機器の売れ筋ランキングを見る ) チューナー - 9位
GTIN (Global Trade Identification Number)	05706622021847
UPC	713803229850
おすすめ度	4.4 5つ星のうち4.4 (4,456) var
カラー	WHITE
ハードウェアインターフェイス	1/4インチオーディオ
ブランド名	ティーシーエレクトロニック(Tc Electronic)
メーカー名	Music tribe
メーカー型番	P0DFU
保証内容	国内正規代理店扱いの TC Electronic製品には、購入日から3年間の保証が適応されます。
制御タイプ	ノブ
動力源	バッテリー式
品目寸法（L x W x H）	25長さ x 51幅 x 76高さ mm
商品の重量	0.03 キログラム
商品スタイル	POLYTUNE CLIP
商品本体サイズ	25 x 51 x 76 mm
商品種別	クロマチック
型番	POLYTUNE CLIP
電圧（ボルト）	240 ボルト
電流	0.1 ミリアンペア

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HK$506

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

2 months ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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tc electronic ポリフォニック クリップ チューナー POLYTUNE CLIP

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tc electronic ポリフォニッククリップチューナー POLYTUNE CLIP