1. When the card approach the reader, the red light turn into green;

2. After glinting to turn red color again, the buzzer sound shows transiting data.

3. It has 500ms proximity time distance for card proximity.

4. After finishing card proximity, if the same ID card is still in the proximity range, reader will not send out the data, neither giving any sound hint.

5. But for Different ID card entering Proximity Area, Reader can do response continually and send out the data.