Features: Compact size, included antenna Power down mode Low power consumption Fast and easy system integration Application: Indentification Access control, Pc access Offline ticketing Customizing cards Payment Road pricing Specification: TYPE:CRT-821(ext. antenna needed) ISO/IEC:ISO/IEC 14443A; ISO/IEC 14443B; ISO/IEC 15693 Tags supported:Mifare One S70; Mifare One Ultralight; Mifare One S50;Mifare Pro; AT88RF020;66CL160S; SR176; SRIX4K; I-code2; TI RFID Tag-it HF-I Operating frequency:13.56MHz Transmission speed:9600-115200bit/s Supply voltage(type.):DC 5V(+/-5%) Supply current(type.):100mA Operating distance:50-100mm(with different antenna) Interface: TTL/RS232/RS485/RS422(RX,TX) Signaling: Two led, one beep Operating temperature:0~50oC