card reader
noun [ C ] uk/ˈkɑːd ˌriː.dər/ us/ˈkɑːrd ˌriː.dɚ/
（信用卡）读卡器
an electronic device that can read the information on a credit card, etc.
To pay, just hold your card up to the card reader. 付款的时候，只需要拿着卡贴近读卡器就可以了。
（电脑）读卡器
a device in a computer, etc. that can move data from another device on which it has been stored
The computer was supplied with an integrated 4 in 1 card reader. 这台电脑配备了四合一读卡器。