BOSS GT-001 (Included) ・Main unit ・Power adapter ・USB cable ※No outer box or instruction manual. This is a multi-effects processor, amp simulator, and audio interface for guitar. It's a desktop type, not the usual floor type, and is recommended for those who use DAWs or DTM. If you install the BOSS TONE STUDIO PC app, you can tweak various settings on your PC, making it user-friendly. You can also connect an optional expression pedal to control wah and volume with your foot.