This is a Peterson clip-on tuner. I've owned various clip-on tuners from other manufacturers, but this one is the most accurate. While it functions without issue, there is a crack in the LCD screen. This listing is for the unit only. [Excerpt from the product description] The StroboClip HD is a clip-on strobe tuner boasting an accuracy of 1/10 of a cent (1/1000th of a semitone). Compared to the previous StroboClip, the HD features an improved display resolution, as the name suggests. The fineness of the strobe section's LCD has increased from 128 divisions to 192 divisions, making it more detailed and easier to see. The number of presets has also greatly increased from 29 to 50. Furthermore, it supports various instruments and temperaments. ■ Strobe tuner for tuning accuracy to 0.1 cent ■ High-definition backlit display ■ Adjustable display angle ■ Wide and easy-to-read display ■ Visible even in direct sunlight ■ Discreet design when clipped on ■ Fine-tuning in Hertz ■ Drop tuning and capo settings are also possible ■ Equipped with 50 presets for various instruments and temperaments Accuracy: 0.1 cent Concert pitch range: 390 ~ 490Hz Tuning range: C0 ~ B6 Number of presets: 50 Weight: 37.5g Power: CR2032 button battery <Preset List> ・Standard Equal Temperament ・Guitar & Bass (Electric Guitar | Acoustic Guitar | DADGAD | 12-String Guitar | 7-String Guitar | Bass | Guitar String Numbers | Bass String Numbers | Baritone Guitar) ・Bluegrass (5-String Banjo | 4-String Tenor Banjo | Mandolin | Dobro (3rd Half) | Dobro | Fiddle) ・Buzz Feiten (Electric Guitar | Bass | Acoustic Guitar | 12-String Guitar | 7-String Guitar) ・Other Stringed Instruments (Lute | Ukulele) ・Lap Steel (A6 | C6) ・Orchestral Instruments (Violin | Viola | Cello | Brass & Woodwinds) ・Temperaments (Just Intonation: Minor | Just Intonation: Major | Werckmeister III | 1/4 Comma Meantone | 1/6 Comma Meantone | Kellner | Kirnberger III | Pythagorean Tuning | Rameau | Vallotti | Young) ・Ethnic Music