Works as confirmed. It's in good condition with no noticeable stains or scratches! You'll be surprised by the same sound quality as the original! More convenient than the original: ・Added Vol. knob ・Internal toggle switch on top ・9v - 18v switching via switch ※9v power supply only This is a self-made EP Booster by HMPF, black VOL & 18V switch FAT improved version, purchased new. Used only at home, no shoes, non-smoking, and no pets. The warranty card is non-transferable, so I cannot include it. The ability to boost to 18V with a switch is attractive! Please note that it only works with a 9V adapter. Unlike the original Xotic EP Booster, boosting via the power supply is not possible. It will be shipped via Yu-Packet Plus. In that case, it will be delivered to your post box, so please be aware of this. The following is quoted from the product overview of HMPF: Overview Made with reference to XOTIC's EP Booster. A famous booster that makes the sound glossy and thick just by passing through it. The internal switch was brought out and a VOL was added for easier use. 18V operation is possible by boosting internally Please switch the 18V switch after turning the effect off. (Please use a stable, manufacturer-made 9V adapter. It will break if you put in 11V or more. Battery cannot be built-in) What is the FAT switch improved version? The original version works on a fairly low frequency band, so the effect is not very noticeable unless you have a large volume and large speakers. Therefore, it has been improved so that the effect can be clearly felt even with a mini amp. The standard version (original specification) is recommended for those who use it for studio practice or live performances. This product is a clean booster, so please be aware that it may be difficult to distort with it or boost distortion. The VOL is the same as the original circuit at the maximum position. It is only for adjusting the volume that becomes too loud when the gain is increased, and it is not for increasing the volume further.