I'm selling this equipment because I no longer use it for streaming (*`・ω・)ゞ There are no noticeable scratches or stains, but please understand that it is a used item m(_ _)m Audio Interface AU-AM100 AU-PM320T Set! Portable audio mixer equipped with multi-functional voice synthesis effects 8 pads can be assigned sound effects for instant playback Microphone noise reduction function Built-in battery allows use anywhere Equipped with a variety of voice processing pitch change and effect functions Dedicated app integration Japanese manual included Portable Audio Mixer This is the perfect audio mixer for those who want to easily start podcasts or Twitch streams, offering 4-channel audio mixing and easy connection to microphones, smartphones, and other sources. It also has a built-in battery, so you can use it anywhere.