Multitestor tested for voltage. The ac POWER CORD is included. Voltage regulator, power supply, powersupply, inverter, adaptor for use with IEC 60950 and other products. Please determine compatibility before purchase. Input is AC 100-240V ordinary household wall plug. This adapter is Western Digital backup equivalent with My Book Essentials 2.0 (under 1TB), My Book Home (under 1TB), My Book Office (under 1TB), My Book Studio (under 1TB), My Book Essentials, My Book Premium, Dual Option USB, Western Digital Essentials, Series II USB and Lighted Combo. Also commonly used to power devices with higher-than-average amperage draw, such as LCD monitors, portable DVD players, external hard drives and higher-end broadband modems and routers. 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 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.