The ZKTeco K40 (and its updated K40 Pro variant) is an innovative biometric terminal designed to seamlessly track employee time and attendance while offering basic access control. It eliminates the need for traditional paper sign-in sheets or punch cards, making it an ideal, cost-effective solution for small to medium-sized businesses looking to eliminate "buddy punching" (where one employee clocks in for another).The system operates using advanced fingerprint scanning, where employees simply place their finger on the scanner to record their clock-in and clock-out times.