Headphone preamp and delay effect for guitar and bass. 1/4" Guitar Plug. 3.5mm headphone output & 3.5mm Aux input. Echo, Feedback and Time controls. Power indicator light. Simply connect directly to your guitar & headphones without disturbing others near you. Plug in your media player and play along to your favorite songs. Dimensions:79.5*75.5*15.5mm. Weight: 40g. Controls: Echo, Feedback, Time. STANDBY/ON/FX switch. Terminals: Phone Jack/AUX In Jack.