Features Usb Interface: This Reader Uses The Usb Interface Plug And Play, The Wire Unfolds About 1.4 Meters, The Interface Line Outside Uses Pvc Material Wrapping to Make The Reader Strong And Durable And More Efficient Transmission. Non Contact Card Reader: This Card Reader Uses Non Contact Card Reader, With Fast Reading, The Response Speed Is Less Than 0.2 Seconds, The Reading And Writing Distance Can Reach 8cm, The Reading Interval Time Is Less Than 0.2 Seconds, And It Supports Id Strong Compatibility: This Card Reader Has Stable Performance And Strong Compatibility, It Adopts Microelectronic Rf Module,for Windows, for Liunx, for Android And Other Systems Plug And Play, Without Installing Driver Software. Sponge Pad: The Bottom Four Sides of This Card Reader Are Equipped with A Sponge Pad, Which Can Be Non Slip And Wear Resistant, And There Are Removable Screws Inside The Sponge Pad. Pvc Shell: This Card Reader Is Made of Pvc Material with A Superb Frosted Environment Friendly Spraying Process on The Surface, Which Can Be Scratch Resistant And Very Durable. Specification: Item Type: ID Card Reader Material: PVC Model: R20D USB Operating Frequency: 125KHZ Reading Speed: 0.2S Reading Distance: Approx. 0-80mm/0-3.15in Read Card Pitch: 0.5S Communication Interface: USB interface Powering Mode: USB Powering Working Voltage: 5V Working Current: 100mA Package List: 1 x Card Reader  1 x USB Cable Package List 1 x Card Reader 1 x USB Cable