215859 Brand AROMA Model ATC-10 Quantity 1 Piece(s) Color Black Material Plastic Compatible Models Guitar Application Tone tuning， chord Other Feature Tuning item: twelve-tone equal temperament; Detection accuracy: +/- 0.5 cent; Dual-color backlight: red light: tuning error; Green light， tuning correct; Power: 1 x CR2032 battery (included): Screen size: 1.7" Packing List 1 x Tuner 1 x CR2032 battery 1 x Chinese / English user manual