Multitester tested for voltage. Power supply voltage EQUIVALENT to Yamaha adapter and other keyboard adapters. AC input 120V and DC output: 9v 200mA (aka: 9 volt DC 0.2A). Amperage can be higher but never lower. Round barrel connector with a hollow positive center. Please check your device for electrical compatibility. Questions are encouraged. Photo is generic. Shape, size and color may differ from 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 5 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 5 day drop-off time2.5mm. Thankyou.