Fast shipping + Free tracking number , Mini Clip Digital Guitar Tuner Accessory For Tuning Chromatic Guitar Bass Violin Ukulele It is designed for tuning chromatic, guitar, bass, violin and ukulele it can 360 - degree freely turn. Automatic tuning, easy for operation. Mini clip design, convenient to use Powered by one CR2032 button battery ... Tuning range: A0 (27.5Hz) - a3 (1760Hz) A4 frequency: 440Hz ... Tuning mode: Auto ... Pick up: Clip Package Includes: 1 x Mini Clip Digital Guitar Tuner , 1 x CR2032 Button Battery . 1 x User Manual