Multitester tested for voltage. This is a voltage EQUIVALENT wall mount version for the CASIO voltage regulator, power supply, powersupply, inverter, adaptor to the Casio MT-35, MT-36, MT-240 MT-640, MT-820. Please check your device compatibility before bidding. Questions are encouraged. AC input 120V and DC output: 9volts DC 0.850A (9VDC 850mA). Amperage can be higher, but never lower. Round barrel connector with a NEGATIVE center. Shape, size or color may differ from auction photo. Special heavy wrapping is provided to protect the prongs. S H in the contiguous USA is $6.(insured shipping). Please see other interesting auctions 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.