Solid Guitar Chord Trainer High Stability Correct Posture Compact Beginner Finger Teaching Chord Practice ToolsSpecifications:Due to the fast learning of how to play the guitar, you can use this tool to help you correct the position of your finger when using, and its light indicates will help you recognize your fault. Adhere to the design of light texture, which will be comfortable to carry anywhere, and the flexibility of the fingers will be better in practice. By making plastic and metal materials, this trainer will be robust and wear-resistant. The length of the product is 18cm, width 4.6cm, height 4.2cm. It is suitable for practicing the places and positions of the string press to strengthen your skills. Item Name: Guitar Finger Training DeviceMaterial: Metal Features: High Stability, Correct Posture, Instant TrainingColor: Black Size Details:18cm x 4.6cm x 4.2cm/7.09" x 1.81" x 1.65" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included:1 x Guitar Finger Training Device1 x User Manual