Shenzhen Qianhai WiseSun Intelligence Technology .
WS1850S - ISO/IEC14443A/B standard 13.56MHz non-contact read/write card-chip
Shenzhen Qianhai WiseSun Intelligence Technology Co. Ltd. WS1850S ISO/IEC14443A/B13.56MHz ,13.56MHz, ,2.0 ~ 5.5V ,8 ~ 10cm ISO/IEC 14443.