Amjimshop All-in-1 USB 2.0 Multi Memory Card Reader 100% brand new and high quality. USB interface, no external power supply, high-speed USB2.0 interface; has LED lights to display the read and write conditions, hot swappable, not a card, LED lamp, when the card has, LED light long bright. Upload, download and read the data, LED light flashes. The default LED light is blue. Size: 68 * 20 * 16 (L * W * H) Reader mode: single letter shows that once only insert a memory card