Brand: Joyo Model: JT-01 360 degree tuner. Old-school tuner design,still reliable and stable. Powered by one CR2032 button battery (included). Battery door with screw-fixed function, to prevent the children from swallowing batteries. For Guitar, Chromatic, Bass, Violin, Ukulele. The JT-01 JOYO 8th Anniversary Tuner - tuning in chromatic modes for Guitar, Bass, Violin, Ukulele C & Ukulele D. LCD screen illuminates nice and bright when in tune.This is nice looking small, responsive all round tuner ideal for tuning. A great model to celebrate 8 years of JOYO tuning Technology. A4 Frequency: 440Hz Tuning Item: Chromatic, Guitar, Bass, Violin, Ukulele C & Ukulele D Tuning Range: 0A(27.5Hz)-8C(4186.01Hz) Weight: 19g Dimension: 50(L) × 26(W) × 76(H) mm Ukulele C is for standard mode (4G 3C 2E 1A) Ukulele D is one note higher (4A 3D 2F# 1B) Battery:1 x CR2032 supplied Brand Joyo SKU JO221EL0VKKQSNAFAMZ-283210 Model JT-01