Brand: Seiko Model: SAT-500 Stylish Chromatic Tuner With Reference Sound. Input Jack & Output Jack Offers Usefulness to the "Silent" Instruments Players. Key Transpose Function is Supported. Digital Cent Indication offers Supremely Accurate Tuning. LCD needle display and LED guidelights Auto and manual modes 12 Pitch Reference Notes Input and output jacks, auto power-off after twenty minutes Batteries Included Brand Seiko SKU SE898EL1ISHC4NAFAMZ-283204 Model SAT-500