The Vox AC30 G2 headphone amp is a fun piece of equipment. It is quite versatile in the sense that it has a line out, so you can record though your software, analog equipment or whatever you are using to record guitar. There are half a dozen built in guitar effects, which can be activated by pressing the FX button. The LED will light up a different color based on which effect is activated. This amp is powered by 2 AAA batteries. This amp sounds like the classic Vox AC30; it has a classic 60's and 70's British rock sound. So it's not gonna sound like an overdriven Marshall stack with that heavy mid guitar sound. It will get kind of a Brian May type of sound. This is a fun amp, and it is perfect for practicing quietly . The durability seems weak, it's lightweight plastic, so it will take time to evaluate the longevity of this headphone amp. But so far so good.