Multitester tested for voltage. This is a voltage EQUIVALENT for many iStereo products with an AC input 100-240V (ordinary household wall outlet plug). PLEASE NOTE: Round barrel connector with a positive center. Please determine compatibility before purchase. Questions are encouraged. S H in the contiguous USA is $10.(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.