When Will Graylin held his iPhone up to a credit card reader to buy lip balm for $5.29, the cashier did a double take.
“That’s the strangest thing I’ve ever seen,” said Bonnie Lingoski, a longtime employee of the Coop in Harvard Square.
Graylin used his smartphone to wirelessly transmit his card number to Lingoski's register. With the tap of a button, he completed the sale, leaving behind an astonished cashier.
He’s gotten used to that kind of reaction. Over the past few months, as he’s been testing the new mobile payments gadget from his Woburn start-up, LoopPay Inc., he’s wowed waitresses, left shop managers speechless, and stunned baristas.
“People are just blown away,” said Graylin, a veteran of the payments industry and local serial entrepreneur. Full story for BostonGlobe.com subscribers.
Michael B. Farrellcan be reached at email@example.com.