Multitester tested for voltage. Voltage regulator, power supply, powersupply, inverter, adaptor, adapter, transformer INPUT: AC 100-127V and OUTPUT: DC 24V 1500mA. Round barrel connector with positive center. Power Supply for Compaq and HP Scanjet 7650, 7400, 7400c, 7450c, 7490C, 5500, 5500c, 5590, 5590p, 5570c, 5550, 5550C, 5530, 4500, 4500cxi, 4570, 4570c, 4570cv, 4850 series scanners. Please determine compatibility before purchase. Questions are encouraged. Photo is generic. Shape, size or color may differ. 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 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.