Usb Port 13.56mhz Mifare Rfid Contactless Proximity Sensor Card Reader. Features: 1.Diagnostic Power LED,waterproof,great Small Compact Design 2.Built in Operating Buzzer,Easy Usage,plug and Play 3.This is a Card Reader, Card Reader Support. It Does Not Support Write. 4.Directly into the Computer Can Use. You Do Not Need to Download the Program. 5.USB Card Issuer Implements the Serial Number of the Card Directly to a Computer Via the USB Port, Users Do Not Load when Using Any Driver, No External Power Supply, the Card Issuer is Connected to the Computer USB Port, Card Indicator Alternates Red and Green, Until You Hear Even After the Buzzer Beeps Twice, Only the Red Light Indicator Shows, You Can Start Card, Credit Card After the Card Number is Displayed at the Cursor Location. 6.Support Systems: operating System Windows 98 XP32 XP64 2000 Vista 32 Vista 64, Android SPECIFICATIONS Model Number: R20 Frequency: 125Khz/13.56Mhz Interface: USB Reading Distance: 5-8cm . We are an international seller, your order will be shipped from abroad so please allow the necessary time of minimum 14 working days for delivery right now depending on where you ship to, due to ongoing delays in postal deliveries globally.