Sonicake US Classic is a headphone pocket guitar amp, plug-in type, designed to give you the tonal mojo of an American classic combo amplifier with the tweed cloth covering, which is wildly employed in millions of tracks from the blues and early classic rock era, The Rolling Stones' Brown Sugar to ZZ Top's Brown Sugar. You just can't be wrong with that light fuzzy, edge of break-up sound. Best paired with headphones with higher impedance. The US Classic comes with a built-in reverb effect, adding additional sonic dimensions to the overall tone. An 1/8 inch AUX input and a PHONES jack make it way easier for the artists to play with their favorite backing tracks, making it a perfect tool for daily practice and pre-show warming-up. The 1/4 inch jack is for plugging straight into your guitar. No batteries needed for this pocket amp! It is USB-chargeable, and we've included a USB charging cable within the package for your convenience. One charge will keep you playing for 5 straight hours. A headphone splitter and a 1/8'' aux cable are also included for extra connectivity, providing more possibilities for various contexts of use. Specification: Dimensions: 97mm(D)×65mm(W)×42mm(H); Weight：130g.