Brand: Eastar is an excellent musical instrument design and manufacturing brand dedicated to the production of musical instruments with more than 20 years of experience Specifications: Simple and portable: Start the tuner clip the tuner to the head of the violin and select Function V. The tuner backlight will show green when the tone is accurate. Note: It is common for the string instuments that the state of new strings are unstable. It takes a few more tunings to stabilize the pitch. Metal Fine Adjustment Knob The function of the fine adjustment knob is to help the violinist to make parts for tuning. Loosen the adjustment knob Adjust the violin neck knob to about 10 cents lower than the standard tone Press the top knob to fix the pitch Gently tighten the knob until the pitch is exactly positioned Adjust A D first and then adjust G E Beginner-Friendly Experience Note: How to choose a violin size for different ages A Violin sizes are based on arm length the arm length is the standard(that is the length from the shoulder to the palm of the hand). 60CM=4/4 age 11 to adult; 56.5-60CM=3/4 age 9-11; 52-56.5CM=1/2 age 6-10; 47-52CM=1/4 age 4-7; Festivals and Special Days coming soon! What will you choose for Gifts? Let have fun with Eastar Musical Instrument right now! Best gift for yourself friends and kids! ♫Click Here to buy the 【Eastar Matte Fiddle Violin Set Full-Size 】 ♫Click Here to buy the 【Saving 20-99$ Eastar Varnish Fiddle Violin Set Full-Size 】 ♫Click Here to buy the 【Saving 30$ Eastar Solidwood 4/4 Violin Set】