JOYO JA-03 English Channel is a miniature guitar headphone amplifier. It allows you to practice your favorite pieces without any problems, without disturbing other people around you. This small, pocket-sized amplifier has many amazing features that add up to high sound quality and great sound. The Gain knob lets you practice distortion solos without wasting power or waking up your neighbors. The advantages of the Joyo JA-03 do not end there - it is also used on stage giving the guitar an extra kick. The compact design of the JOYO JA-03 is not tantamount to sacrifices in construction, as evidenced by the quality of workmanship and the selection of components of this effect. The plastic housing is durable and the jack inputs are well protected in any situation. The potentiometers are very smooth and have a wide range of adjustment, giving the guitarist precise control over his sound. Specification: Effect Type: English Channel MP3 jack input: 3.5mm Headphone jack: 3.5mm Potentiometers: Gain, Tone, Volume Material: ABS plastic LED power indicator Power: Two AAA batteries (included) Weight: 54g Dimensions: 89(L)X77(W)X26(H)mm Warranty: 24 months