https://www.mypos.com/pdf/recources/myPOS-PreAuthorization-UserGuide-en.pdf?5 - Pre-authorization user guide Go
https://www.mypos.com/pdf/recources/myPOS-PreAuthorization-UserGuide-en.pdf?5– Pre-authorization user guide Combo
https://www.mypos.com/pdf/recources/myPOS-PreAuthorization-UserGuide-en.pdf?5 - Pre-authorization user guide Carbon
https://www.mypos.com/pdf/recources/myPOS-PreAuthorization-UserGuide-en.pdf?5 - Pre-authorization user guide Slim
https://www.mypos.com/pdf/recources/myPOS-PreAuthorization-UserGuide-en.pdf?5 - Pre-authorization user guide Hub
https://www.mypos.com/pdf/recources/myPOS-PreAuthorization-UserGuide-en.pdf?5 - Pre-authorization user guide Hub+