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 wdm