Brand: BLACKSTAR Compatible Devices: Guitar Material: Plastic Product Dimensions: 31D x 38W x 86H mm Item Weight: 0.04 Kilograms Power Source: Battery Powered Directly plugs into your guitar. A headphone amplifier for the fastest way to get authentic sound. Features three channels: Clean, Crunch, and Lead. Each channel has 3 types of chorus, delay, and reverb effects, for a total of 9 effects to choose from. Features a 180-degree rotating, retractable plug mechanism, allowing for angle adjustment to suit your guitar. Battery-powered for up to 17 hours of use, so you can play anytime, anywhere. Equipped with an AUX input jack for jam sessions with an MP3 player. Used only a few times, in good condition. Please note that the outer box and instruction manual are not included. Also, I will include batteries for testing.