... Working frequency: 125kHz, 13.56MHz 2) For access control purpose Product Description:EM9921,9960 RFID Keyfob Specification Model No ... 70o Storage temperature -40oC to 80 Material ABS Assembly Ultrasonic Water proof Y Technology GK4001 (125KHz, 64bit, R/O) ... ) Y Application: Door Access Control, Burglar Prevention, Patrol Management, Personal Identification,Car Park Control, Member Club Management, etc. ...