Forced mask wearing alert: If the recognizing face does not wear a mask, the device will prompt a voice reminder. At the same time, the authentication or attendance will be failed. Face mask wearing alert: If the recognizing face does not wear a mask, the device will prompt a voice reminder. At the same time, the authentication or attendance is valid. Face recognition distance: 0.3 m to 3 m. Max. 6000 faces capacity, Max.10,000 cards, and Max. 150,000 event capacity. Face recognition duration ＜ 0.2 s/User; face recognition accuracy rate ≥ 99%. Two-way audio with indoor station and main station. Supports 6 attendance status, including check in, check out, break in, break out, overtime in, overtime out.