This is a tube-loaded rotary speaker simulator from Hughes & Kettner. It can be used for guitars, as well as keyboard instruments. This Rotosphere MK2 is a later model, and unlike the earlier model, the body has a stainless steel feel and is glossy and very clean. The functions are also different from the earlier model, thanks to the footswitch, which allows you to stop the rotation and makes it easier to use as a preamp. Especially with an electric guitar, you can get a unique overdrive feel as a preamp, in addition to the rotary effect. This is a rare effector that has already been discontinued, so this is a great opportunity for those looking for one. I think it's rare to find one in this good condition with good working order. The product condition is beautiful with no major scratches. The tubes are still in good condition. The new selling price was quite high at the time, but even now, the used market price for this later model hasn't gone down. If you are interested, please consider this opportunity. I used both the early model and this later model at the same time, and the sound quality was almost the same for both, but the usability of the later model is overwhelmingly better. Original box included Genuine adapter included Please check the images and description carefully before making a purchase. This is a rare item with no alternative, so we will only sell to those who agree to NCNR (No Claims, No Returns). Thank you for viewing.