Multitester tested for voltage. Power supply is voltage EQUIVALENT for many AT T telephone bases. AC input 120V (ordinary household wall plug outlet). Please determine compatibility of your device before purchase. Questions are encouraged. Photo is generic. Shape, size or color may differ from photo. Special heavy wrapping is needed 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.