... card M1 can be used for access control or attendance, which can save the cost of installation access control for users. Features:1, it is ... alarm, open delayed alarm, stressing alarm etc. 2, set the time for open freely, and detect the statement online. 3,powerful ... -condensing: -10°C -- +70°C EM reading distance:≤5cm reading time: ≤0.2s communication interface:RS485,TCP/IP storage capability:20000pcs ...