Guzheng Tuner, so you can easily use the mobile phone to do tuning for your Guzheng. Easy to use, precise instructions, it is your powerful Guzheng partner. When you pluck at the string of your musical instrument, it can automatically measure the pitch of the string, and through a variety of methods to indicate the accuracy of the pitch; addition, it can issue the standard sound of the strings, for you to tune through listening. Pitch indication accuracy 0.2 cents, A4 standard note adjustment range of 430 to 450Hz, accuracy 0.1Hz.