Multitester tested for voltage. Genuine ORIGINAL factory SONY Powersupply Input: ac 120V (ordinary household wall outlet plug) and Output: dc 4.5V 500mA. Round barrel connector with a POSITIVE center. Converter, voltage regulator, transformer, adapter for Sony MZE40 and MZR3 portable MD minidisc player and many others. Also for Sony MDR-IF5000 and many others. Please determine compatibility before purchase. Questions are encouraged. Special heavy wrapping is provided to protect the prongs. S H in the contiguous USA is $5.(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. Thankyou.