Multitester tested for voltage. This is a voltage EQUIVALENT wall mount version adapter for many CASIO keyboard voltage regulator, power supply, powersupply, inverter, adaptor. Please check your device compatibility before looking. Questions are encouraged. AC input 120V (ordinary household wall outlet plug). Amperage can be higher, but never lower. Round barrel connector with a NEGATIVE center. Photo is generic. 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 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 time.