The Zoom G1 Four is a multi-effects processor designed for use with electric guitars. Offered in an easy to use stompbox format, the G1 Four sports a wide selection of effects, amp emulations, and other features, such as an onboard 30-second looper and a chromatic tuner. With 68 built-in rhythm patterns, you can add drum loops to the mix, which can be quite helpful during looping. Distortion, chorus, reverb, and more are all on hand, as are 13 amp models that simulate classic combinations. Five effects can be chained at any time and in any order. You can save these effects in one of the 50 user preset patches. Switch among patches (or banks of patches) quickly with the tap of a toe, so you can change your live or studio sound with ease. You can also change global characteristics to retain a sense of unity among patches. A three-knob tone stack and the overall output level knob do not change as you cycle through your sounds. The pedal sports 60 different effects, and you can edit or add more effects from your computer too.This bundle comes with a HPC-A30 Closed-Back Studio Monitor Headphones from Polsen are designed for monitoring audio in studio, field, mobile, and DJ applications. They feature 50mm drivers that provide a frequency response of 18Hz to 22kHz for accurate reproduction of your audio. Plus a 9V AC Power Adapter from ART and a high performance Strukture Audio Cable built to stand up to the most grueling tour conditions imaginable. Box Contains Zoom G1 Four Guitar Effects Processor Strukture SC10R 10 Feet Instrument Guitar Cable4 x AA Batteries1-Year Warranty Polsen HPC-A30 Closed-Back Studio Monitor Headphones 1/4" Adapter1-Year Warranty ART 9V AC Power Adapter 1-Year Warranty