Multitester tested for voltage. This is an Genuine factory original Westellvoltage regulator, power supply, powersupply, inverter, adaptor, adapter, transformerINPUT:AC 120VandOUTPUT:10.5VAC 900mA (aka: 10.5 Volts AC 0.9A). Round barrel connector with ahollow center. BE CAREFULL. This model modem uses two different voltages (the other is 12V). Be sure your modem needs the 10.5V. Shape, size or color may differ from product photo.S&H in the contiguous USA is $5.(insured shipping).Please see other interesting products by JGritUSPS 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. Thankyou.