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B7 Clip on Cartoon OWL Chromatic Tuner ●The Swiff B7 Clip-On Cartoon OWL Chromatic Tuner works with most stringed instruments， it is easy to operate even under darkened stage conditions. Built-in vibration sensor for accurate tuning in noisy areas.FeaturesFashionable Cartoon OWL shape One-handed 180° swivel clamp Battery integrated in the clamp， easy for replacement. Color-changing backlight (orange means out of tune and green means in tune) Accurate tuning in noisy areas Improved software for faster response and improved accuracy Large LCD that's easy to read in the dark SpecificationTuning Scale: Chromatic， Guitar， Bass， Violin， Ukulele Tuning Mode: Vibration Tuning Range: A0 (27.50 Hz) - C8 (4186 Hz) Calibration: A4 = 440Hz Precision: ± 1 cent Response Time: <20 ms Power: 3V (CR2032 Lithium battery， not included) Dimensions: 62mm x 33mm x 51mm (with clip) Weight: 33g Colors: Brown， Black， White， Pink， Blue Package include：1 x clip on digital tuner (batter is not included)