1Free Full SDK (demo program with source code , VB,VC,DELPHI) 2Support for ISO14443A (1KS50S70) 3Operation frequency : 13.56Mhz 4Built-in transceiver antenna 5Reading distance 0 to 10cm OS : for win XP/ win2k/ win vista/ win7/ win8(32bit and 64 bit)/ linux Features: Free Full SDK (demo program with source code, VB,VC,DELPHI) Support for ISO14443A (1KS50,S70) Operation frequency:13.56Mhz Builtin transceiver antenna Reading distance 0 to 10cm ,OS : for win XP/ win2k/ win vista/ win7/ win8(32bit and 64 bit)/ linux Specifications: Operation Frequency : 13.56MhzBuiltIn Transceiver AntennaReading Distance 0 to 10cmLess than 35ms decoding timeUSB 2.0 / USB 1.1 interfaceeVoltage:DC 5 VWorking Current:60mABuiltin bicolor LED(red/blue) and buzzerSize : (95 x70x 18)mmOS :Forwin XP/ win2k/ win vista/ win7/ win8(32bit and 64 bit)/ linux Please download software from the following linksER301_SDK_EN.rarhttps://app.box.com/s/iibrizlt7ujvve85xu7x Package included:1 x 13.56Mhz forISO14443A Reader & Writer USB Interfacefor RFID 1 x S50 CARD1 x S50 BLUE KEY TAG1 x S50 STICK TAG Note:Please note that the new type and old type of this productwill be sent randomly, and make sure you will not mind before ordering.