Thank you for viewing. Cleaned and maintained. Operation confirmed with battery and adapter. ACA specification. There may be scratches and dirt that are not visible in the images. Checked, but please understand that there may be some crackling due to its age. Please check the other details in the images. Stored in a non-smoking environment. Shipping will be done by wrapping in bubble wrap and putting it in a cardboard box. - Model Name: SD-1 - Color: Yellow - Type: Overdrive - Power: 9V battery or AC adapter - Controls: LEVEL, DRIVE, INPUT, OUTPUT