The delay time is listed as 500ms.
Here is the answer to your question. I will tell you of a Google search technique you can use in the future. Ask Google to search for something like "fingerprint sensor". Then display all the images. Look through the images for something that looks like what you are looking for. In our case, we are looking for a fingerprint sensor with 6 wires. Several sites have the 6 wire picture, but only use 4 wires.
I finally found this site that identified the other wires, "$49.90 - Fingerprint Scanner Sensor (Arduino Compatible) - Tinkersphere". The other wires are for a proximity sensor. That allows the sensor to be powered down until someone actually puts a finger on the device and triggers the proximity sensor and causes the reader to be powered up.
So, the other two wires are really "don't care" for your project.
Paul