This product is an RFID access control card reader, which is widely used in access control market. It used the latest central process unit (CPU) and memory chip of large capacity. There will be of no information loss even in case of power failure. With strong power three ways to open door: open by card read , open by card + password, and open by password.
||Red-power pilot, Black-access granted, Yellow-Beep
||3 x 4 Flat membranes