【Product Overview】 Don't Fret is an indicator designed to accurately show finger positions when playing stringed instruments. It is especially helpful for beginners and children in learning the correct finger placement. 【Target Instruments】 This product is compatible with 1/2 size violins and 12-inch violas, making it ideal for smaller instruments. 【Patented Technology】 It has been granted US Patent No. 6,452,080, guaranteeing its unique design and functionality. - Brand: Don't Fret - Product Name: Finger Position Indicator - Target Instruments: 1/2 Violin & 12" Viola - Patent Number: US Patent No. 6,452,080 - String Length: 286 mm Thank you for viewing.