Used for one month after purchase and then stored. There are no scratches, but the cord has turned brown with age. Please understand that this is a used item. No box or instruction manual. "Pendant-type wave generating device Adio If" Adio If is a pendant-type wave generating device that applies the principle of wave resonance. Adio If resonates with the "brainstem," also known as the seat of life. By wearing the pendant around your neck, you can expect it to protect the brainstem from electromagnetic waves.