Designed to handle up to four distinct logical or physical connections through a single USB interface.
macOS 11 (Big Sur) and later have stricter security. You may need to allow the driver in Security & Privacy under “Allow system software from developer.” Ff-usb 4 In 1-3 Driver
4 in 1 SZTW160 USB Multifuncational EMV Credit Card Reader Writer Designed to handle up to four distinct logical