The unit is in very good condition, fully tested and in working order. It has a few marks around the body and paint damage to the edges, please see photos. Comes with power supply and original box. 

The Boss GT-100 is a multi-effects processor designed for guitarists, featuring a COSM (Composite Object Sound Modeling) processor that recreates vintage and modern amplifier sounds, as well as a range of effects including delay, reverb, chorus, and more. It includes 200 user patches and 200 factory patches, allowing for extensive customization of tones. The unit features a dual-LCD display and eight knobs for easy control and adjustment of settings. It supports USB connectivity for firmware updates and software integration with a computer.