Multitester tested for voltage. This ADAPTER is a voltageEQUIVALENT version with all the electricalrequirements equal to YAMAHA powersupply Input: ac 120VAC and Output: dc 12VDC 700mA (aka: 12 volt DC 0.7 amp). Amperage can be higher, but never lower. Round barrel connector witha hollow positive center. Converter, voltage regulator, transformer, adapter used for YAMAHA electronic synthesizer instrumentsthat usePA-3B, PA-130 and PA-3C and many more keyboard models. Please check your device for power requirement. Shape, size or color may differ from product photo. Special heavy wrapping is provided to protect the prongs. S&H in the contiguous USA is $6.(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 strictlywithinUSPS control and not within the control of seller. Please leave 5 stars for seller 4 day drop-off time.