JOYO JMT-03 Features: This is two in one: tuner & metronome. Digital Tuner is more accurate, very sensitive and wide range. It has tuner, metronome and TAP tempo metronome functions. Can rotates 360 degrees for easy view. It can stand the unit on a flat surface or clip this unit on a flat surface or instruments, so it supports MIC and CLIP tuning modes. Powered by one CR2032 button battery (NOT INCLUDE). Tuning for Chromatic, Guitar, Ba, Violin and Ukulele .Specifications: Tempo: 30-250 bpm Tap Tempo: 30-250 bpm A4 Frequency: 410-450Hz Tuning Range: 0A(27.5Hz)-8C(4186.01Hz) Tolerance: +/-1 cent Tuning Modes: MIC, CLIP Package size: 8.2 * 5.7 * 3.5cm / 3.2 * 2.2 * 1.4in Package weight: 45g / 1.59ozPackage List: 1 * Clip-on Tuner 1 * User Manual (English & Chinese) JOYO JT-01 Features: Digital Tuner is more accurate, very sensitive and wide range. Can rotates 360 degrees for easy view. It clip this unit on a flat surface or instruments. Powered by one CR2032 button battery (NOT INCLUDE). Tuning for Chromatic, Guitar, Ba, Violin, Ukulele C and Ukulele D.Specifications: Color: Black Mode: JT-01 A4 Frequency: 440Hz Tuning Range: 0A(27.5Hz)-8C(4186.01Hz) Tolerance: +/-1 cent Package size: 4 * 3.5 * 5.3cm / 1.6 * 1.4 * 2.1in Package weight: 30g / 1.03ozPackage List: 1 * Clip-on Tuner 1 * User Manual (English & Chinese) T-02 Guitar TunerFeatures: * Tuning items: chromatic, guitar, violin, ukulele. * Claic clip-on design, makes it easy to tune with one hand. * One-button operation, easy and convenient to use. * LCD screen with 2-color backlight: Green-in tune, White-out of tune. * Mini-size body, lightweight and portable, convenient for storage.Specifications: Model: T-02 Material: ABS Color: Black A4 Frequency: 440Hz Power Supply: 1 * 3V CR2032 Battery (not included) Tuning Accuracy: 0.5 cent Item Size: 32 * 47 * 50mm / 1.26 * 1.85 * 1.97in Item Weight: 23g / 0.81oz Package Size: 7.8 * 4.3 * 3.4cm / 3.07 * 1.69 * 1.34in Package Weight: 29g / 1.02ozPackage List: 1 * Guitar Tuner