Please measure your guitar neck before ordering. It is suitable for guitars between 47 and 53 inches. (Please note: this project is not suitable for classical guitar). 2. Rapid progress with validated and effective systems suitable for all age groups. 3. Quickly practice chords and play your favorite songs. 4. Start playing from the moment you connect the practice aid device to the guitar. 5. Six universal basic chords Package includes: 1 * Guitar teaching aids Attention: 1. Due to manual measurement, please allow for minor errors. Please ensure that you do not mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your delivery information (such as name, street, house number, doorbell/email without a name, etc.) is incorrect, the order will not be delivered correctly