36147 Brand new and high quality Color: black Tuner head size: 5.8 x 3.2 cm Folding height: 3.7 cm Adjustable angle of tuner head: 90° ( up and down ); 360° ( right and left ) Tuning item: violin， Chromatic， viola， cello， double bass Tuning mode: automatic Tuning range: A0 ( 27.5 hz ) - A6 ( 1760 hz ) A4 frequency: 440 hz Powered by 1 x CR2032 button battery ( Not included ) 1 x Tuner 1 x User guide In original package