Bibtone Acoustic CAPO Q : Smartphone Holder for Guitar Black. / Suits for electric guitar, acoustic guitar and classic guitar. Acoustic Capo Q is designed to be used as a capo and a smartphone holder. All Guitar Q series suits for IPhone, Samsung Galaxy and any device ranged from 57mm to 80mm It also suits for electric guitar, acoustic guitar and classic guitar. A 360 degree revolution. Available at any angle. Visit our website for more information: http://www.bibtone.com/