BOSS SD-1 SUPER OverDrive. The item includes only the main unit. *Box, manual, adapter, etc. are not included. Operation has been confirmed. MADE IN U.S.A. (Made in the USA). Serial number is RT-23XXXX. The op-amp is a National Semiconductor LM308N. There are some scratches and dirt (relatively good condition). It will be shipped via Takkyubin Compact or Yu-packet Plus. *The shipping company may change depending on the situation, but the shipping cost and anonymous shipping will not change. I will not answer questions about serial numbers other than those disclosed in the images. #Effecter #Proco #Proco #Distortion #Distortion #Made in USA #ProcoRAT2USA