This is a BOSS SD-1 SUPER OverDrive. The item includes only the main unit. *Box, manual, adapter, etc. are not included. Operation has been confirmed. ACA power supply type. *When using an adapter, if operated with anything other than an ACA power supply, it may not function correctly. MADE IN JAPAN (Made in Japan). The serial number is faintly printed and is unknown. ET5212-510B board, op-amp is JRC 4558DD. There are scratches and dirt. The battery snap has been repaired. Shipping will be via either Takkyubin Compact or Yu-Packet Plus. *The shipping company may change depending on the circumstances, but the shipping cost and anonymous shipping will remain the same. I will not answer questions about serial numbers other than those shown in the images. ↓OD-X, SD-X of different specifications are also on sale. ・OD-2 BOSS Turbo Overdrive Boss #BOSSOD2TW #Effecter #BOSS #Boss #OverDrive #Overdrive #Made in Japan #BOSSSD1JP