Multitester tested for voltage. This is a voltage EQUIVALENT power adapter for Korg AX-30B a few other models with an input: AC 120V (ordinary household wall plug outlet) and DC output: 9V. Please ask questions to determine the correct adapter. Questions are good. Shape, size and color may be different than photo. Photo is generic. Special heavy wrapping is provided. S H in the contiguous USA is $5.(insured shipping). Please see other interesting items for JGrit. USPS DELIVERY TIME: As stated in the item listing, seller will drop-off your item to the USPS within 4 days of receiving cleared payment. How long it takes to deliver to your door is strictly within USPS control and not within the control of seller. Please leave 5 stars for seller 4 day drop-off time. Thankyou.