COWEEN Pocket Guitar 6 Strings Portable Guitar Practice Gadgets 6 Fret Pocket Strings for Beginners Functions: Improving your fingers sensitivity and speeding up the progress of guitar playing. Adjustable: 6 Strings tightness can be adjusted by wrench; Strings can be replaced. Small Voice: The portable guitar aim to practice your fingers, not for playing voice, the voice is very small, not bother others. Good Material: 6 Frets build with mahogany wood, lightweight and durable high strength plastic shell. Portable: Weight: Approx 145g; Closed Size: Approx 9.8" x 2"x 1" / 25cm x 5cm x 2.5cm; Opened Size: : Approx 17.7" x 2" x 1" / 45cm x 5cm x 2.5cm