The AC-500 type percussion massage gun features adjustable settings. - Model: AC-500 type - Ammeter: mA display - Adjustment dial: Adjustable from 0-100 Notes: Power-on operation has been confirmed. Please make your judgment based on the images. Other functions are unconfirmed. This is a used item, so please refrain from purchasing if you are looking for a new item or are very particular about condition. Overhaul and repair history are unknown. This is an antique/vintage item. Future operation cannot be guaranteed. Please consider this as a junk item. There are small scratches, deterioration, and dirt. Please check the accessories in the images. Regarding Returns and Exchanges: Thank you for your patronage. We are very sorry, but we do not accept returns or exchanges for purchased items. #ShowaRetro