HID the card reader group is not much different, you essentially need to place a forward order with them of x thousand units committed per year before they share you more than the advertising flyer for some of there stuff. said flyer for no good reason has 0 technical details, no dimensions, no power supply range, no interfaces that are supported. They give no info on the thing and want me to sign saying "Sure I'll by 5000 of these things, with penalties if I do not"
Due to this I bodged together a alternative that ended up being better than what there advertisement sheet promised, and burned me on ever using there products again.