Multitester tested for voltage. These are ORIGINAL factory GENUINE SAMSUNG wall mount battery charger with the following: AC input 100-240V and output: DC 4.75V. Special heavy wrapping is provided to protect the prongs. S&H in the contiguous USA is $3.(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.