Jet black emperor black 30 x 30 x cm Hardness and specific gravity of the highest class on earth There is a that can only be felt with this stone A

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.

【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary.

【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product.

【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. Audio board jet black emperor black 300 Size: 30 x 30 x thickness 1.3cm Weight: approx. 3.5kg Quantity: 1 piece Processing: Honed polishing (1 surface/4 sides), bottom surface is carved from raw stone Emperor black has a particularly high specific gravity among rocks and is the highest class of rock. The sound and tightness are completely different. Processed from Emperor Black, which has the highest hardness and specific gravity of any rock currently in circulation on earth. This is the highest class material for an audio board.