You can get a thick low end, a solid mid-range, and a sense of sound pressure that you can't get with a normal setting. This is an equalization that supports modern high-gain. With a low-noise specification, you can also use it like a British-style crunch to an amp-like sound by turning down the Gain. We highly recommend this to those who are looking for a more amp-like sound. The 3-way switch (NATURAL BOGNER mode, DB mode, TUBE mode from left) allows you to switch modes to accommodate all kinds of distortion sounds. ■■Twin Drive Mode■■ The foot switch added to the top of the unit switches to the knobs on the side of the unit. The left knob (GAIN2) and the right knob (LEVEL2) allow you to boost the sound, such as during solos. You can set separate settings for backing and lead and switch between them instantly, making it a practical way to use it. The ON-OFF check lamp is ultra-high brightness BLUE (blue) during normal use, and switches to ultra-high brightness RED (red) in BOOST mode. Both 9V batteries and AC adapters are supported. *Since this product is also listed on other sites, it may end early. Type...Electric Guitar Manufacturer...BOSS