I'm selling this because I no longer have the opportunity to use it. It can be used with guitar effects units like the HX STOMP, quad cortex, and Kemper, or to control PC operations from the floor, and it can also connect to smartphones, etc. Wireless connection is also possible. It's a very convenient piece of equipment. Please see here for more details: http://rockinf.net/eyes/?p=5350 I'm selling it at a low price, so how about taking this opportunity? ■ Features ・Almost unused, only tested for operation. ■ Included Items ・Main unit ・All documents Product page ■ https://hookup.co.jp/products/xsonic/airstep