Traveler Guitar Acoustic Headphone AmpDesigned for guitarists on the go. Traveler Guitar headphone amps let you jam anywhere and everywhere. The TGA 1A is fully equipped with blend, tone, and volume controls, brightness FX, and also features an aux in to add backing tracks to your headphone mix. Blend, tone, volume controls Brightness FX with on standby switch Audio output: 1 8" headphone jack Instrument input: 1 4" and 1 8" aux in 3 1 8 x 3 x 1 2 in. 1 oz. Rechargeable internal battery