VOX VGH-ROCK Built-in Guitar Amplifier Headphone Amplifier Like new, only used once after purchase. No cable required. A headphone-type guitar amplifier that lets you enjoy playing just by connecting it to your guitar. Features the clear sound of stack amps, typical of the 80s and 90s. Built-in effects (reverb/chorus/delay) to add color to your sound. Plays for up to approximately 16 hours. Battery-powered, so you can play anytime, anywhere. Uses Audio-Technica closed-air dynamic headphones. Can also be used as regular headphones.