Multitester tested for voltage. Power supply voltage EQUIVALENT for Harman Kardon 02320V speakers adapter with AC input 120V and AC output: 15V AC 1.1A. (aka: 15volt AC 1100mA). Amperage can be higher, but never lower. Please check your device for electrical requirements. Shape, size or color may differ from photo. Round barrel connector with a hollow center. PLEASE NOTE: this adapter plug will NOT fit the DELL-HARMAN KARDON 03E125 speakers that come with a DELL COMPUTER. The DELL-HARMAN (06941v) speaker system uses the same adapter but with a special skinny barrel plug. This "skinny plug adapter" is available for an additional charge of $5.00. Special heavy wrapping is provided 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 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.