ZKteco K40 TCP/IP USB Biometric Fingerprint Time Attendance System W/ Battery US

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ZKTeco K40 USB Biometric Fingerprint Time Attendance System Built-in Battery

ZKTeco K40 ID/IC USB Biometric Fingerprint Attendance System Built-in Battery

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ZKteco K40 TCP/IP USB Biometric Fingerprint Time Attendance System W/ Battery