This is a simple theremin originally sold by Ishibashi Gakki. It was used, but has been stored in a closet for a long time. 【Please read the following carefully】 ※Please note that I haven't been able to confirm its functionality with an amplifier, as I don't have one currently. ※The sponge in the battery holder is missing. ※Everything in the photos is included (no box). It has been stored at home and hasn't been used recently. Please check the condition of the scratches and the points mentioned above in the description and photos, and understand that this is a used item before purchasing. Please refrain from purchasing if you are a perfectionist or are overly concerned about details. A theremin with simple operation and adjustable tone. - Model Name: THEREMIN - Output Adjustment: Volume adjustment knob - Frequency Adjustment: Frequency adjustment knob - Country of Manufacture: Made in Japan - Brand: Ishibashi Thank you for looking. 2509197493