Multitester tested for voltage. Power supply voltage EQUIVALENT for Harman Kardon DELL computer 03E125 speakers adapter with AC input 120V (ordinary household wall outlet plug). Amperage can be higher, but never lower. Please check your device for electrical requirements. Shape, size or color may differ from photo. SKINNY Round barrel connector with a hollow center. PLEASE NOTE: this adapter plug will NOT fit the HARMAN KARDON 02320V speakers. The DELL-HARMAN speaker system uses the same adapter but with a special skinny barrel plug. Special heavy wrapping is provided to protect the prongs. S H in the contiguous USA is $8.(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.