Contactless Card Reader Specification for Choice ISO ISO14443 A,B and ISO15693 Read/Write Device Features Power supply: from USB port or +9VDC(DC5V) Reading card type: Mifare Standard 1k/4k; I CODE SLI Data output interface: RS232/USB Operating temperature: -15~+55 degree Operation distance:50-100mm Power voltage:DC 9V+- 5%(DC5V+- 5%) Application Access control, time attendance, parking, payment