ZKteco K40 is an innovative biometric fingerprint reader for access control application. With high-performance firmware functions and compact design, it has become one of ZKTeco’s most popular devices, because It is works with ZKTeco’s latest firmware with user-friendly UI and flexible user privilege settings for multi-level man With optimization of both hardware platform and firmware. The device offers TCP/IP, USB host, Buitl-in battery, Simple access control or external bell, SSR report in excel forms, Supports WDMS.