They have small electricity consumption and strong interference resistance.It can read card bi-directionally, has intelligent lights to alert if card data is read correctly.Exquisite magnetic installation structure makes card reading more stable and , which is patented technology.This product is small and .MSR90 is a USB emulation keyboard interface that does not need any driver or software.It can work on , Word, Excel, or any keyboard type.MSR90 is hand swipe operated magnetic card reading machine with USB interface,adopting high integrated magnetic card decoding chip.Colour:blackMaterial:MetalPackage Contents:1 x ReaderOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store