The square provide a reader with c input to attach to phone

[Bigjohnson]

The square supply a c input card reader

[JK_Fiber_Art]

Hi Bigjohnson,

If you're referring to the Square Reader for magstripe, they have one for a headset jack and one for a Lightning connector. No USB-C. A better option is Square’s contactless and chip reader which you can connect via bluetooth.  The other benifit of this reader is there's less liability as compared to accepting just magstripe alone.

jk