It consumes little power and has strong anti-interference capabilities. It can read cards in both directions and has a smart light to alert you when card data is read correctly. The sophisticated magnetic mounting structure makes card reading more stable, which is a patented technology. This product is very small and compact. MSR90 is a USB emulation keyboard interface that requires no drivers or software. It can work on Word, Excel, or any keyboard type. MSR90 is a manual swipe magnetic card reader with a USB interface, which uses a highly integrated magnetic card decoding chip. Color: Black Material: Metal Package Contents: 1 x Reader Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.