Multitester tested for voltage. This is a voltage EQUIVALENT adapter for some Yamaha electronic keyboards with the following specs: AC input 120V and DC output: 12V 700mA (aka: 12VDC 0.7A). Amperage can be higher, but never lower. Round barrel connector with a hollow positive center. Photo is generic. Shape, size and color may differ. Special heavy wrapping is provided to protect the prongs. S H in the contiguous USA is $4.(insured shipping). Please see other interesting items by 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.