Neewer&reg; NW-102 Rechargeable Clip-on Tuner with 360 Degree Rotational Large Color Screen Light LCD Display for Guitar, Bass, Violin, Ukulele and Chromatic Tuning Modes Compatible with guitar, bass, violin, ukulele and chromatic tuning modes Large and full color display Fast and accurate in tuning, provide you with quick, stable and precise tuning experience Built-in rechargeable battery design. Both energy saving and environmental protection Flexible; freely turns 360 degrees