A:AnswerThe Omron 5 series can use batteries or an electrical cord. The cord unfortunately is sold separately.
I purchased my Omron 5 series from Best Buy, but Omron had the cord on sale for $19.99 so I purchased it from Omron healthcare directly since the sales price was cheaper. If you choose to purchase from Omron directly make sure you go to Omron healthcare. There's some other type of company that is also called Omron.
This is the basic Omron 5 series that I purchased.
Hope this helps.