" Enjoy pure portability from a petite sized amp packing a 1 watt punch. Makes for a excellent travel companion as no electrical outlet required and Exclusively recommended for electrical guitars. 1/4-Inch headphone jack and 9V adapter jack (Best with Polaroid 9V Batteries) Explore many tones from crunch to clean with the Gain, Tone and Volume controls. Black 'Chicken' head knobs mimic this amps bigger brother and a red 'jewel' indicates this amp is fired up and ready to rock!"