Only used indoors. There are no scratches or stains, and the operation is also problem-free. A multi-functional multi-effects unit, capable of creating a variety of sounds such as drive and reverb. - Model Name: MS-50G+ - Type: Multi-effects unit - Functions: Drive, preamp, delay, reverb - Included Accessories: Instruction manual, warranty - Input Terminals: Mono, stereo - Display: LCD screen Thank you for viewing.