Multitester tested for voltage. This is a voltage EQUIVALENT wall mount version adapter forAltec Lansingvoltage regulator, power supply, powersupply, inverter, adaptor forAC input 120V and DC output:18V 1000mA (18VDC 1.0A). Amperage can be higher, but never lower. Round barrel connector with a hollowPOSITIVE center. Please check your device for correct electrical compatibility. Adapter size, color and shape may differ from photo in that it may be a wall type (like the photo) or it might be a brick type.Special heavy wrapping isprovided to protect the prongs. S&H in the contiguous USA is $5.(insured shipping).Please see other interesting products by JGritUSPS 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 strictlywithinUSPS control and not within the control of seller. Please leave 5 stars for seller 4 day drop-off time. Thankyou.