They have low power consumption and strong interference resistance. It can read cards bidirectionally, has intelligent lights to warn if card data is read correctly. The exquisite magnetic installation structure makes card reading more stable and reliable, which is our patented technology. This product is very small and compact. MSR90 is a USB emulation interface that does not need any driver or software. It can work with Word, Excel, POS systems or any keyboard type. MSR90 is a hand-held magnetic card reader with a USB interface, which uses a highly integrated magnetic card decoding chip. Colour: 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 +/- 1-3 cm.